免耕稻茬麦植株、土壤系统氮素平衡研究  

NITROGEN BALANCE BETWEEN WHEAT PLANT AND SOIL IN NO TILLAGE FIELD AFTER RICE REAPING

作　　者：田奇卓[1] 亓新华[1] 王俊领 范春华 

机构地区：[1]山东农业大学 [2]任城区农业局

出　　处：《核农学报》1997年第3期157-162,共6页Journal of Nuclear Agricultural Sciences

摘　　要：研究表明，免耕稻茬麦吸收积累的氮素４９４％来自肥料氮，氮肥的当季利用率为４５９８％，植株对其依赖程度高于旱作水浇麦。肥料氮土壤残留率为２７８７％，回收率为７３８４％，损失率为２６１６％。百公斤籽粒和生物产量吸氮量分别为３７０和１４４ｋｇ。肥料氮的７２４％分配到籽粒中，高于总氮的分配比例。返青、拔节、三叶及种肥的吸收率依次为９７２％、１１．３５％、１０．７９％和７０２％。三叶期液态施用优于固态，返青期深施优于浅施。The experimental results indicated that about 49.4% of the nitrogen, which was absorbed and accumulated by wheat plant grown in the soil of no tillage field after rice reaping, was from fertilizer. The utilization percentage of fertilizer was 45.98% in the same season. The wheat plant growing in this field was more dependent on the nitrogen derived from fertilizer than that of growing on the irrigated dry farmland. The residual percentage of fertilizer nitrogen in this soil was about 27.87%, the nitrogen recovery percentage was 73.85% and the loss percentage was 26.16%. The amount of nitrogen absorption or one hundred kg grains and biomatter were 3 70kg and 1.44kg respectively. The partitioning percentage of nitrogen derived from fertilizer into grains was 72.4%, which was higher than that of the total nitrogen in this soil. The absorption percentage of nitrogen fertilizer applied at reviving, jointing, three leaves and sowing stage were 19.72%, 11.35%, 10.71% and 7.02%, respectively. It was more benificial for wheat plant using liquid fertilizer instead of solid fertilizer at three leaves stage. Buried fertilizer was more effective than surface applicatin at reviving stage.

关 键 词：免耕稻茬麦 氮素平衡 施氮方法 小麦 

分 类 号：S512.016.2[农业科学—作物学]