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残膜对土壤氮排放和氮肥利用效率的影响

open access: yesShuitu Baochi Xuebao
[目的] 为探明不同残膜量对氮素利用效率及损失的影响。[方法] 试验设置5个不同残膜量(0,180,360,720,1 440 kg/hm2)和2种残膜类型(聚乙烯和生物降解残膜),通过盆栽试验,研究不同残膜含量对土壤全氮、氮素气态损失、氮肥利用效率及番茄生长等指标的影响。[结果] 随着残膜含量的增加,土壤氨气和氧化亚氮的累积排放量呈先增大后减小的趋势,当残膜含量达到720 kg/hm2时,氨气累积挥发量显著减少11.31%~13.70%,氧化亚氮累积排放量减少4.74%~5.13 ...
阮国杰   +4 more
doaj  

[Research progress on the causes of pain in knee osteoarthritis]. [PDF]

open access: yesZhongguo Xiu Fu Chong Jian Wai Ke Za Zhi
Wei N, Zheng Z.
europepmc   +1 more source

[Research progress on animal models relevant to porto-sinusoidal vascular disease]. [PDF]

open access: yesZhonghua Gan Zang Bing Za Zhi
Li M, Wang JZ, Liu CH.
europepmc   +1 more source

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