No matter what the soil moisture treated, being with waterlog in normal paddy or upland condition in GCRPS field, once nitrate as nitrogen fertilizer source. N2O emission increased remarkably.
不论是旱种还是水田，只要增加硝态氮源，土壤n2o的排放就极显著增加。
Sink: source ratio could be affected by plant density or fertilizer supply level.
库源比既受肥料水平的影响，也受密度的影响。
Animal manures were the main source of organic fertilizer, but their application for farming lands were limited due to a lot of pathogens, parasite ova and toxicant contained.
尽管畜禽粪便是有机肥料的主要来源，但是其携带的大量病原菌、寄生虫卵和有毒物质是影响畜禽粪便农田利用的主要原因。
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