摘要
用￣１５Ｎ同位素示踪稀释法研究了玉米单作及与大豆混作的氮来源，结果表明，单作玉米来自土壤氮占８７．２０％～９２．８８％，来自肥料氮仅占７．２％～１２．８％；与大豆混作时，玉米来自土壤和肥料氮分别比单作降低了１３．１４％～２１．７７％和１４．０４％～２６．９６％；玉米从大豆固氮产物中获得氮１３．７２％～２２．１４％。
N resource of corn plants in monoculture and mixture of corn and soybean was conducted inplot and potting experiments in 1992 by using isotope dilution technique. The%Ndff and%Ndfsof corn plants in monoculture were 7.12%～12.8%and 87.20%～92.88%respectively.whilethe%Ndff and%Ndfs were decreased by 14.94%～26.96%and 13.14%～21.77%respec-tively in the mixed culture as compared with monoculture. 13.72%～22.14%of corn plants inthe mixed culture was transfered from the N_2-fixation by soybean plants.This is the third N re-source of corn plants in the mixture.
出处
《西北农业学报》
CSCD
1994年第1期59-61,共3页
Acta Agriculturae Boreali-occidentalis Sinica
基金
新疆维吾尔自治区科学基金资助项目
关键词
^(15)N
玉米
大豆
混作
氮来源
^(15)N isotope dilution technique
Corn
Soybean
Mixture
