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(7)固定作用。象矿化作用一样,固定作用模式也是调整帕普兰(PAPRAN)模式得来的。由于固定作用决定残茬分解速率,而残茬分解作用对土壤侵蚀有重要作用,所以固定作用是EPIC模式中一个很重要的过程。日固定量是从作物残茬氮量减去微生物同化量而得到的。 WIM=(DCR)(FR)(0.016—C_(NFR)) ……………………………………… (17) 式中:WIM—氮固定速率(公斤/公顷·天);C_(NFR)—作物残茬中含N量(克/克),FR—水平作物残茬(公斤/公顷),假如C=0.4FR,微生物量和它们不稳定产物的C:N比等于10,
(7) fixed role. Like mineralization, the mode of action of immobilization is also derived from the PAPRAN mode. Fixation is a very important process in the EPIC model because fixing effects determine the rate of stubble decomposition and stubble decomposition plays an important role in soil erosion. The daily fixed amount is obtained by subtracting the amount of microbial assimilation from the amount of crop stubble. WIM = (DCR) (FR) (0.016-C_ (NFR)) where: WIM - nitrogen fixation rate in kg / ha · day; C_ (NFR) - amount of N contained in crop residues (grams per gram), FR-level crop residues (kg per hectare), and C = N ratio of microbial biomass and their destabilized products equal to 10 ,