%0 Journal Article
%T Effects of straw incorporation and N fertilization on soil respiration during maize (Zea mays L.) growth in Huanghuaihai Plain<br>秸秆还田方式和氮肥类型对黄淮海平原夏玉米土壤呼吸的影响*
%A LI Wei
%A ZHANG Jia-Bao
%A ZHANG Cong-Zhi
%A <br>李 玮
%A 张佳宝
%A 张丛志
%J 中国生态农业学报
%D 2012
%I 
%X A field experiment was conducted in the Fengqiu State Key Agro-ecological Experimental Station in China's Henan Province to measure soil respiration in maize farmland ecosystems from June to October, 2010. Soil respiration was measured in the nine-treatment experiment using LI-COR-6400-09 Soil Respiration Chamber completed with Infrared Gas Analyzer (IRGA). The results indicated that soil respiration rates at 20 cm depth under treatments of burying straws in-between maize lines (ISFR) was significantly higher (P< 0.05) than those under the treatments of removing (NSFR) and mulching (SFR) straw with conventional fertilization. Average soil respiration rates of ISFR, NSFR and SFR were (209.22±75.63) mg(C)·m-2·h-1, (169.51±45.50) mg(C)·m-2·h-1 and (161.14±26.32) mg(C)·m-2·h-1, respectively. Average soil respiration rate under buried straw plus chemical N fertilizations of 16.8 kg(N)·hm-2 (ISF1), 33.6 kg(N)·hm-2 (ISF2) and 50.4 kg(N)·hm-2 (ISF3) were (148.67±35.07) mg(C)·m-2·h-1, (124.11±23.18) mg(C)·m-2·h-1 and (178.85±46.60) mg(C)·m-2·h-1, respectively. The difference between ISF3 and ISF2 treatments was significant at P< 0.05. Under treatments of buried straw with chicken manure applications of 16.8 kg(N)·hm-2 (ISOM1), 33.6 kg(N)·hm -2 (ISOM2) and 50.4 kg(N)·hm-2 (ISOM3), average soil respiration rates were (135.07±21.97) mg(C)·m-2·h-1, (208.08±31.54) mg(C)·m-2·h-1 and (171.43±43.31) mg(C)·m-2·h-1, respectively. Compared with ISOM2, ISOM1 and ISOM3 significantly decreased soil respiration rates by 35.09% and 17.61%. The cumulative CO2 emissions under ISOM1, ISOM2 and ISOM3 during maize growth were 324.16 g(C)·m-2, 499.39 g(C)·m-2 and 411.43 g(C)·m-2, with significant differences in both cumulative CO2 emissions and average soil respiration rates among the treatments at P < 0.05. Cumulative CO2 emission under ISOM2 treatment during maize season was significantly higher than that under ISF2 treatment. It was therefore concluded that the effect of burying straws in-between maize lines combined with chicken manure on soil respiration rate was significantly greater than that with chemical N fertilizer. At chicken manure application rate of 33.6 kg(N)·hm -2, the conditions of C/N ratio were optimum for soil microbial metabolism and population.
%K Huanghuaihai Plain
%K Maize field
%K Straw incorporation pattern
%K Type of N fertilizer
%K Soil respiration rate
%K Maize farmland ecosystem<br>黄淮海平原
%K 玉米田
%K 秸秆还田方式
%K 氮肥类型
%K 土壤呼吸速率
%K 玉米农田生态系统
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=03F54A49DE00578AA0E5DDF5BC021AA7&cid=1A8B5357F0EF07B8&jid=AB3ABF502E2E1FF39F0E3B80164C9031&aid=F6F80FAD71E363AECC2BF2559A328E09&yid=99E9153A83D4CB11&vid=A04140E723CB732E&iid=DF92D298D3FF1E6E&sid=043C7D0F3F6AC1B3&eid=8AD9BBE1FAF6BB78&journal_id=1671-3990&journal_name=中国生态农业学报&referenced_num=0&reference_num=0