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Agronomic efficiency of intercropping tomato and lettuce
Cecílio Filho, Arthur B.;Rezende, Bráulio L.A.;Barbosa, José C.;Grangeiro, Leilson C.;
Anais da Academia Brasileira de Ciências , 2011, DOI: 10.1590/S0001-37652011000300029
Abstract: four experiments were carried out at the s?o paulo state university, brazil, with the aim of determining the agronomic viability of intercropping tomato and lettuce, under greenhouse conditions. the studied intercropping systems were established by transplanting lettuce at 0, 10, 20 and 30 days after transplanting (dat) tomato and by transplanting tomato at 0, 10, 20 and 30 dat lettuce. intercropped tomato and lettuce were evaluated during two seasons and compared to their sole cropping. the experimental design was a randomized complete block with nine treatments. the productivity and the classification of the tomato fruits were not influenced by having lettuce intercropped with it, but lettuce production was lowered when tomato was intercropped with it. the longer the delay in lettuce transplanting, the greater the reduction in its productivity. there was an effect of cropping season on the extent of the agronomic advantage of intercropping over sole cropping. in the first cropping season, intercropping established by transplanting lettuce during the interval between 30 days before up to 20 dat tomato yielded land use efficiency (lue) indices of 1.63 to 2.22. in the second period, intercropping established with the transplanting of lettuce up to 30 days before tomato yielded lue indices of 1.57 to 2.05.
Above and Below Ground Interactions in Monoculture and Intercropping of Onion and Lettuce in Greenhouse Conditions  [PDF]
Jessica L. de Haan, Liette Vasseur
American Journal of Plant Sciences (AJPS) , 2014, DOI: 10.4236/ajps.2014.521347
Abstract: Intercropping has been seen as an advantageous strategy in sustainable agriculture. Plants however interact with one another both above and below ground with members of the same species (intraspecific) or members of a different species (interspecific) for nutrients, water and light. It is therefore essential to understand these interactions when intercropped. The objective was to examine the above and below ground interactions between onion and lettuce in monocrop and intercrop systems. We examined the various possible interactions (no competition, above ground, below ground, or full) using a full factorial randomized design under greenhouse conditions. Onion yield was highest in intraspecific above ground competition and lowest in below ground and full interspecific competition with lettuce. Dry weight of onions in above ground competition with lettuce was significantly greater than that of the control group. Fresh weight of lettuce leaves were highest in below ground and full interspecific competition treatments. The hectare model and yield results suggest that there is strong below ground competitive effect between onion and lettuce in intercrop. Asymetric interspecific facilitation was found: facilitation by onion led to increased lettuce yield but a negative effect of lettuce on onion yield was observed. Knowledge of competitive interactions between component crops can have several applications in sustainable agricultural as it helps to match the most efficient species under specific conditions.
Economic analysis of the intercropping of lettuce and tomato in different seasons under protected cultivation
Cecílio Filho, Arthur Bernardes;Rezende, Bráulio Luciano A;Costa, Caciana C;
Horticultura Brasileira , 2010, DOI: 10.1590/S0102-05362010000300015
Abstract: lettuce and tomato are vegetables that can be grown in protected cultivation, under given conditions. considering their expensive production systems, intercropping might be an excellent alternative to optimize costs. four experiments were carried out at the s?o paulo state university (unesp), at jaboticabal, brazil, to study the economic viability of intercropping lettuce and tomato under protected cultivation. to set the intercropping, lettuce was transplanted 0, 10, 20, and 30 days after transplanting (dat) tomato and vice-versa, in two seasons, namely april to september 2003 and january to june 2004, when monocultures of both vegetables were also carried out. at the first planting season, operational profits (op) in intercropping (lettuce transplanted 0, 10, and 20 dat tomato) were higher than in monocultures. at the first season, the return rates (rr) and op were very much alike, whereas at the second season, rr in intercropping were lower than in monoculture. transplanting tomato after lettuce, at both the first and second seasons, resulted in higher op than those in monocultures. rr, op and the profitability index (pi) were higher at the first than at the second season, independent of the growing system. rr in intercropping, independently of the intercropping schedule, were higher than in monoculture. in general, pi of tomato in monoculture and in intercropping were quite similar and both were higher than pi in the monoculture of lettuce. the economic indexes confirmed the agronomic viability (expressed by the index of area use efficiency) of transplanting lettuce and tomato simultaneously in both growing seasons; transplanting lettuce 10 and 20 dat tomato, in the second season; and transplanting tomato after lettuce in all studied schedules. the economic indexes reached their peaks when tomato and lettuce were transplanted at the same day, in the first growing season (in average): op of brl$ 12,948.63 (us$ 4,273.48) in 614.4 m-2; rr of 6.7% and ip of 85%.
Viabilidade agron?mica de consórcios entre cebola e alface no sistema organico de produ??o
Paula, Patrícia D de;Guerra, José Guilherme M;Ribeiro, Raul de LD;Cesar, Marcius Nei Z;Guedes, Rejane E;Polidoro, José Carlos;
Horticultura Brasileira , 2009, DOI: 10.1590/S0102-05362009000200014
Abstract: three intercrops of onion (cv. alfa tropical) and lettuce (cv. regina 2000) were compared, varying the time intervals between transplants of each one in the field. the experiment was made in a complete randomized block design with the treatments (replicated six times): monocrops of onion and of lettuce, and intercrops of the two vegetables keeping the same onion spacing arrangement, with lettuce transplanted on the same day, 15 days, and 30 days after onion. lettuce seedlings were placed between onion rows in an alternating manner, thus corresponding to half of its monocrop population density. except for the last treatment (lettuce 30 days after onion planting) the intercropping system was advantageous in terms of increased income by cultivated area unit. introducing lettuce into the system did not decrease onion yield in marketable bulbs. in addition, lettuce growth was comparable to that of its monocrop. the land equivalent ratio values confirmed the viability of intercropping onion and lettuce. besides the adequate agronomic performance, the system leads to more efficiency of inputs and hand labor utilization under the organic management adopted.
Viabilidade agron mica de consórcios de brócolis e alface estabelecidos em diferentes épocas Agronomic feasibility of broccoli and lettuce intercropping established in different growing periods
Silvana Ohse,Bráulio Luciano Alves Rezende,Lucas Sleutjes Silveira,Rosana Fernandes Otto
IDESIA , 2012,
Abstract: A produ o de hortali as cresce acentuadamente, decorrente do aumento do consumo entre outras raz es, da busca por alimentos mais saudáveis. Objetivou-se verificar a viabilidade agron mica do consórcio entre brócolis e alface, em fun o do sistema de cultivo e época de estabelecimento do consórcio. O ensaio foi realizado em Ponta Grossa, PR, Brasil, o qual constou de 11 tratamentos, resultantes da combina o dos fatores sistemas de cultivo (monocultura e consórcio) e épocas de transplante da alface [0, 7, 14, 21, 28 dias após o transplante (DAT) do brócolis], conduzido em delineamento de blocos casualizados com quatro repeti es. A produtividade e classifica o das "cabe as" de brócolis em cultivo consorciado, independente da época de estabelecimento do consórcio, n o diferiram das obtidas em monocultura. A produtividade das plantas de alface foi influenciada pela época de estabelecimento do consórcio. As plantas de alface cultivadas em consórcio aos 28 DAT do brócolis n o apresentaram qualidade comercial. O índice de eficiência no uso da área foi influenciado pela época de transplante da alface, sendo reduzido à medida que se atrasou o mesmo. Os consórcios estabelecidos até 14 DAT do brócolis foram viáveis agronomicamente em rela o a ambas culturas (alface e brócolis) produzidas isoladamente. The production of vegetables is growing rapidly because of increased consumption, due to, among other reasons, the desire for healthy eating. To evaluate the feasibility of broccoli and lettuce intercropping as a function of the growing system and the establishment time of the intercropping, an experiment was conducted in Ponta Grossa, PR, Brazil, which consisted of 11 treatments of the combination of cropping systems (monoculture and intercropping) and lettuce transplanting time (0, 7, 14, 21, 28 days after broccoli transplantation - DAT), conducted in a randomized block design with four replications. The yield of broccoli heads under intercropping did not differ from the monoculture, independent of the establishment time period of the intercropping. The lettuce yield was affected by the establishment time of the intercropping. The lettuce plants grown in intercropping at 28 DAT of broccoli did not have commercial quality. The index of efficiency in the use of the area was influenced by the time of transplant lettuce, being reduced to the extent that transplanting of lettuce was delayed. The intercropping established up to 14 DAT of broccoli are agronomically feasible in relation to their monocultures (broccoli and lettuce).
Intercropping of Sugarcane with Onion and Potato Followed by Sesame in Paired Row System  [PDF]
G.M.A Hossain,S.M. Bokhtiar,S.K. Paul,M.R. Anam
Journal of Agronomy , 2003,
Abstract: An experiment was made to evaluate the agronomic and economic performance of different intercrops viz. Onion (Allium cepa), Potato (Solanum tuberosum) and sesame (Sesamum indicum) with sugarcane in paired row system. Sugarcane with potato followed by second intercrop sesame produced the highest yield of cane, potato and sesame. Maximum number of tiller, millable cane, cane diameter and unit stalk weight were observed in the same crop combination. On the contrary, sugarcane with onion followed by sesame produced maximum economic return. Brix (%) of cane juice did not varied significantly. So Intercropping with sugarcane performed better in respect of agronomic and economic benefits over sole cane.
Nitrogen fertilization on intercropping of lettuce and rocket
Barros Júnior, Aurélio P;Cecílio Filho, Arthur B;Rezende, Bráulio Luciano A;P?rto, Diego RQ;Prado, Renato de M;
Horticultura Brasileira , 2011, DOI: 10.1590/S0102-05362011000300024
Abstract: the work was carried out at unesp, jaboticabal, s?o paulo state, brazil, from september to december 2006, to evaluate the effect of nitrogen fertilization on intercropping of lettuce and rocket. the experiment was conducted in a randomized complete block design, with four replications, treatments being arranged in a 4 x 4 + 2 factorial design. the treatments were the result of a combination of four n rates for lettuce (0, 65, 130 and 195 kg ha-1) and four n rates for rocket (0, 65, 130 and 195 kg ha-1), plus two additional treatments, which corresponded to lettuce and rocket under single cropping. veronica (lettuce) and folha larga (rocket) were the cultivars used. an increase in the n rate for both cultures, under intercropping system, caused fresh matter gains and higher yields for lettuce and rocket, maximizing the land equivalent ratio (1.84) at 127 kg ha-1 of n for lettuce and 195 kg ha-1 of n for rocket.
Performance of lettuce in sole cropping and intercropping with green manures
Negrini, Ana Clarissa A;Melo, Paulo César T de;Ambrosano, Edmilson José;Sakai, Rogério Haruo;Schammass, Eliana Aparecida;Rossi, Fabrício;
Horticultura Brasileira , 2010, DOI: 10.1590/S0102-05362010000100011
Abstract: the performance of lettuce in sole and intercropped with green manures was assessed under different establishment times. the lettuce fresh and dry weight, number of leaves per plant, diameter and length of head, and fresh and dry weight of green manure were evaluated. the intercropping design was additive and both cash and cover crops were planted in rows. the experimental design was of randomized complete blocks in split plot scheme, with six replicates. the plots represented the green manure sowing days (0, 20, 40 and 60 before transplanting of lettuce), and the sub-plots were assigned by cropping systems (lettuce in sole crop and intercropped with black oat, cowpea or white lupin). simultaneous planting in the intercropping did not affect the lettuce performance. however, when the green manures were sown before lettuce, they influenced it in a negative way. among the green manures, cowpea increased biomass and had a higher negative effect on lettuce performance compared to white lupin, which appeared to produce less competition. the sole crop and the intercropping with simultaneous planting of the green manures resulted in a better lettuce performance.
Economic analysis of cucumber and lettuce intercropping under greenhouse in the winter-spring
Rezende, Bráulio L. A;Cecílio Filho, Arthur B;Barros Júnior, Aurélio P;Porto, Diego R. Q;Martins, Maria Inez E. G;
Anais da Academia Brasileira de Ciências , 2011, DOI: 10.1590/S0001-37652011000200028
Abstract: the economical analysis complements the evaluation of the intercrop systems efficiency, considering besides the physical production of crops, the price of products according to their quality classification and time of the year. intercropping systems of lettuce and cucumber in two plant populations under greenhouse were economically evaluated in winter-spring, in jaboticabal city, s?o paulo state, brazil. the total operating cost (toc) of cucumber and lettuce as sole crop and intercropping were estimated, as well as gross revenue (gr) and operating profit (op). the labor for the crops was the component with greater participation in the toc of crops in intercropping and single crop. greater gr and op were observed in intercrops established by transplanting lettuce and cucumbers on the same day. considering the operating profit and the land efficient ratio, it is recommended the intercropping of lettuce transplanted until 10 days after the transplanting (dat) of cucumber with two rows per plot, and at 0 dat of cucumber grown with a row plot
N transfer from green manures to lettuce in an intercropping cultivation system
Sakai, Rogério Haruo;Ambrosano, Edmilson José;Negrini, Ana Clarissa Alves;Trivelin, Paulo Cesar Ocheuze;Schammass, Eliana Aparecida;Melo, Paulo César Tavares de;
Acta Scientiarum. Agronomy , 2011, DOI: 10.4025/actasciagron.v33i4.6766
Abstract: the aim of this work was to evaluate the transfer of n via biological nitrogen fixation from green manures to intercropped lettuce using the 15n abundance method. the treatments consisted of lettuce with black oats, lettuce with cowpea, lettuce with white lupin and monocropped lettuce (control). green manures were sown at two different times including the following: 60 days before transplanting of lettuce seedlings and simultaneous to transplanting of lettuce seedlings. n transfer was estimated using the natural 15n abundance method. it was observed that lettuce intercropped with green manures reached the same fresh mass of monocropped lettuce when the green manures were sown at the same time as the vegetables were planted. however, when the green manures were sown previously, the fresh mass of the monocropped lettuce was higher, and independent of the sowing time of green manures, the monocropped lettuce reached a higher dry mass. white lupin and cowpea transferred higher amounts of n regardless of sowing time, and the c:n ratio of white lupin to cowpea was lower compared to black oats. intercropping with white lupin, cowpea and black oat transferred 18%, 17% and 7% of n, respectively, to lettuce.
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