秸秆配施氮磷化肥对潮土氮磷含量变化的影响  

Effects of straw application with N , P fertilizer on available N and P contents in chao soil. Journal of Zhejiang Agricultural University, 1998,24(4):359～363

作　　者：娄运生[1,2] 杨玉爱[1,2] 徐本生 杨建堂[1,2] 

机构地区：[1]浙江农业大学土壤与农业化学系 [2]河南农业大学农学院

出　　处：《浙江农业大学学报》1998年第4期359-363,共5页

基　　金：浙江省自然科学基金

摘　　要：采用室内恒温培养法研究了秸秆配施氮、磷肥对潮土供氮磷特性的影响．结果表明：秸秆施入土壤２～３个月后，土壤碱解氮有明显提高．秸秆单施或与磷肥配施，矿化过程表现为前期净固持后期净矿化．配施氮肥，麦秸和玉米秸前期矿化氮释放量很少，而花生秸矿化可明显提高土壤碱解氮水平．不同秸秆矿化对土壤速效磷影响不同，这与其Ｃ／Ｐ比有关，但前期（１～２个月）都能提高土壤速效磷水平．Indoor thermostatic culture was used to study the effects of different straws applied with N,P on available N and P contents of chao soils . The results indicated that the content of available N increased significantly after straws were applied to soils 2-3 months . With application of straws solely or together with P fertilizer , the straws' mineralization was net fixation at early stage and net mineralization at later stage . When applied with N fertilizer ,wheat straw and maize straw were hardly mineralized to available N. Peanut straw, however, could significantly increase available N content through its mineralization .The different effects of three kinds of straw's mineralization on available P content were related to their C/P ratio. Nevertheless, all given straws could increase available P at early stage (1-2 months) .

关 键 词：秸秆 矿化 碱解氨 速效磷 潮土 氮肥 磷肥 

分 类 号：S158.3[农业科学—土壤学] S153.61[农业科学—农业基础科学]