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Search Results: 1 - 10 of 32 matches for " Inforzato "
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Estudo do sistema radicular de Tephrosia candida D. C.
Inforzato, Romeu;
Bragantia , 1947, DOI: 10.1590/S0006-87051947000200002
Abstract: 99,14% em peso das raízes de tephrosia candida d. c. se encontram nos primeiros 0,50 m de profundidade, em solo do tipo de terra roxa misturada. a profundidade máxima das raízes aí atingida foi de 3,85 m. o peso total das raízes de 16 plantas estudadas foi de 8.810,12 gr. assim, uma cultura da tephrosia, em linha e no espa?amento de 0,35, fornecerá ao solo, em 5 anos, o total de 87.022 kg de raízes ricas de nódulos bacterianos, por alqueire.
Distribui??o do sistema radicular da cana de a?úcar var. co. 290, em solo tipo terra-roxa-legítima
Inforzato, Romeu;Alvarez, Raphael;
Bragantia , 1957, DOI: 10.1590/S0006-87051957000100001
Abstract: observations were made on the development of sugar cane roots (var. co. 290) in red soil ("terra-roxa-legitima") at the usina tam?io, araraquara. root samples were taken from commercial sugar cane fields when they were 6, 12 and 18 months old. the results showed that the distribution of the root system of the variety studied was uniform in the different layers of soil. most roots were present in the upper 30cm of soil, with an average for the 3 samplings of 59.3%. roots of 6-month old plants already reached 2.10m, and after 18 months they reached as far as 3.30m. the maximum amount of living roots was found when the plants were 12 months old, this being correlated with the highest growth rate of the plant. a sugar cane field that yields 100 tons per hectare was estimated to have about 1.8 tons of roots at 6 months and 8 tons of them after 18 months.
Sistema radicular do feijoeiro em dois tipos de solo do estado de S?o Paulo
Inforzato, Romeu;Miyasaka, Shiro;
Bragantia , 1963, DOI: 10.1590/S0006-87051963000100046
Abstract: the studies on the root system of the bean plant (phaseolus vulgaris l.) developed in two types of soils of the state of s?o paulo were carried out to serve as a basis for a better understanding of the problems connected with the application of mineral fertilizers to this crop. the results obtained showed that a great percentage of the roots (74.5% in massape soil and 87.4% in the arenito de bauru soil) is found in the upper 10cm soil layer and practically all in the upper 20cm of soil (83.6% and 97.4%, respectively).
Sistema radicular das principais leguminosas empregadas como adubo verde em cafezal
Scaranari, H. J.;Inforzato, R.;
Bragantia , 1952, DOI: 10.1590/S0006-87051952000300008
Abstract: root .systems of the following leguminous plants used for green manure in coffee plantations were studied :- canavalia ensiformins d. c., crotalaria juncea l., styzolobium sp (mucuna an?) and glycine max (l). merrill var. otootan.. it was noted that the depth of the root system' of each one of the four, espécies is related id the height attained by the; plants. the deepest, root system was found to be thatf of crotálaria juncea, followed by canavalia esiformis, soybeans and mucuna an?. for coffee green manure purposes it is concluded that the four studied leguminous espécies can be used safely even having .most of their root system located in the first 30 cm of the soil
Quantidade de água transpirada pelo cafeeiro sombreado e pelo ingazeiro
Franco, Coaraci M.;Inforzato, Romeu;
Bragantia , 1951, DOI: 10.1590/S0006-87051951000200003
Abstract: the present paper discusses the amount of water lost by the soil through the transpiration of coffee plants and shade trees in shaded coffee plantation. all methods and techniques employed in the study of transpiration of the shade tree inga edulis mart, were exactly the same as those described in a paper recently published (4). it was determined previously (3) that a shaded coffee plant receiving 55% of full sunlight transpired 80% as much as when in 100% full sunlight. the amount of water transpired by a coffee plant was calculated by taking 80% of the amount transpired in unshaded plantation (4). comparing the water lost by transpiration of shaded coffee plants and shade trees with the average rainfall in campinas, s?o paulo, brazil, it is seen that from april to september the amount of water transpired exceeds the average rainfall. this finding seems to agree with our previous conclusion (1, 2, 5) that water competition between shade trees and coffee plants is the factor that controls the success of growing coffee under shade in the state of s?o paulo, brazil. the highest daily rate of transpiration encountered, for inga edvlis was 36.7 milligrams per square decimeter per minute. the average daily transpiration was found to be 9.90 grams per square decimeter per day. the total amount of water transpired by an inga tree was calculated to be 71,140 liters per plant per year. since the plants submited to the experiment did not suffer a water shortage at any time, the present results show the approximate amount of water lost by the inga tree and shaded coffee plant under optimal soil-water conditions.
O sistema radicular do cafeeiro nos principais tipos de solo do estado de S?o Paulo
Franco, Coaraci M.;Inforzato, Romeu;
Bragantia , 1946, DOI: 10.1590/S0006-87051946000900001
Abstract: a new method for the study of the root system of the coffee plant coffea arabica l. is described. the method consists in excavating a ditch along a row of four plants, 15 cm apart from the trunks. blocks of soil 30 cm square and varying thickness, depending on the depth from which they were taken, were removed so as to include a complete cross section of the root system. the first three layers were 10 cm thick; the next two layers, 20 cm; the remaining layers (variable in number), 30 cm thick. the roots from each block were washed, air dried and weighed. the data obtained were used to draw the excavation maps as represented in graphics, i, iv, vii, x and xiii. on theses maps each dot represents 0.1 g of roots. a formula is given to estimate the weight of the whole root system, from the data thus obtained. the method just described was used to study the root system of the coffee tree in four different types of soil of the state of s?o paulo, brazil. it is pointed out that the study of the root distribution based on weight alone might lead one to erroneous conclusions, since the first layers contain heavy non-absorbing roots whereas many active roots, light in weight, are located in deeper layers. a much better idea about the root distribution in the soil was obtained by drawing the excavation map on a black cloth in true seale, and then spreading the roots removed from each block soil inside the corresponding place in the map. the pictures of this arrangement are reproduced in fig. iv, v, vi, vii and viii. the best root distribution was found in the soil "terra-roxa misturada" in the campinas county (fig. iv). in this soil the roots extend beyond 2.5 m depth and are very' well distributed through the soil. the poorest root distribution was found in the soil "terra-roxa legítima" in the eibeir?o preto county (fig. v). in this soil the roots are mostly confined to the superficial layers. a study of the soil profiles wrhere the trees were growing offered an explanation
Quantidade de água transpirada pelo cafeeiro cultivado ao sol
Franco, Coaraci M.;Inforzato, Romeu;
Bragantia , 1950, DOI: 10.1590/S0006-87051950000900001
Abstract: in determinations made with a porometer it was verified that the stomatal opening of coffee leaves increases in size immediately after the leaves are detached from the plant (fig. 1). this fact indicates that the method of rapid weighings of detached leaves is not suitable for studies on the transpiration of the coffee plant. the transpiration of coffee plants has been determined by the weighing potted plant method. pots with a capacity for 51 liters were used. they were made of galvanized iron plate and had no drainage hole. when the moisture content of the soil approached the wilting point water was added to bring all the soil mass to fiel capacity. in order to avoid oxygen depletion the pots were not sealed. to decrease the direct evaporation at the soil surface a two-centimeter layer of rice hulls was used as mulch, and a celotex cover was placed on top of the pot. three similar pots with the same type of protection, but without plants were used to measure the direct evaporation from the soil surface. the weight losses of these pots were subtracted from the weight losses of the pots with plants. two to throe-year old plants of coffea arabica var. bourbon were used. three plants were employed each month and after this time their leaves were picked off, and the total leaf area was determined. the tests were carried out for a whole year. the transpiration rates were calculated in g/dm2/day. the total leaf area of an adult coffee plant was found to be 3,146 dm2 (average of seven trees). based on this average and on the transpiration rate of the experimental plants it was possible to calculate approximately the amount of water that an adult coffee plant would transpire under the same conditions. since the plants submitted to the experiment did not suffer water shortage at any time, the present results show the approximate amount of water lost by the coffee plant under optimal soil-water conditions. the data are presented in table 1. the figure 1 shows the monthly amo
Desenvolvimento do sistema radicular do arroz semeado diretamente e plantado por mudas, em duas séries de solo do Vale do Paraíba, SP
Guimar?es, Geraldo;Inforzato, Romeu;
Bragantia , 1973, DOI: 10.1590/S0006-87051973000100005
Abstract: the development of the root system of two rice varieties, iguape agulha and iac-435, planted either by direct sowing in rows or by seedling was studied in soils of the series ?barro de telha? and ?coruputuba? under irrigation and drainage systems during the years 1967/68 and 1968/69. individual plants of the variety iguape-agulha planted by direct sowing in rows produced 71.5 g of roots; 86% of the root weight were concentrated in the first 15 cm of the soil. when planted by seedling the root system weighed 40.3 g, 86% of which were concentrated in the upper 15 cm of the soil. the root system reached the depth of 55 cm. the variety iac-435 planted by direct sowing in rows yielded 109.7 g of roots, 86% of which were found in the first 15 cm of the soil. when planted by seedling it weighed 69.8 g, 81% of which were concentrated in the upper 15 cm of the soil. the maximum depth reached by these roots was 75 cm.
Sistema radicular do Dolichos Lablabem um solo massapê-salmour?o
Inforzato, Romeu;Mascarenhas, H. A. A.;
Bragantia , 1967, DOI: 10.1590/S0006-87051967000100016
Abstract: studies were made of the root distribution of dolichos lablabin a reddish-yellow podzol (massapê-salmour?o) soil in the state of s?o paulo. twenty eight percent of the roots by weight were found in the upper 20 cm layer of soil. the rest, uniformly distributed down to the maximum depth, reached 3.4 m. it was calculated that when the crop is planted at a 0.2m x 0.5m spacing, it leaves 1.5 tons of roots in the soil, per hectare.
Estudo do sistema radicular do algodoeiro nos três principais tipos de solo do estado de S?o Paulo
Cavaleri, Popílio A.;Inforzato, Romeu;
Bragantia , 1956, DOI: 10.1590/S0006-87051956000100024
Abstract: the development of the root system of two cotton varieties grown in the three main soil types of the state of s. paulo was studied. under the conditions tested, cotton roots reached very deep, in some cases as deep as 2.5 m. the variety i. a. 7387-24940 had a deeper and denser root system than the i. a.campinas 817. it was found that the root system of cotton plants grown in the "terra-roxa-misturada" soil was the deepest, followed by the root system of plants grown in "massapê" and then in "arenito de bauru". regardless of the variety or soil type, 80% of the total root system occurred to a depth of 20 em. due to this fact emphasis is given to shallow cultivation in cotton plantings as a mean to prevent damage to the root system of the plants.
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