作物学报2018，Vol.44Issue(3)：431-441,11.DOI:10.3724/SP.J.1006.2018.00431
西南旱地油菜间作紫云英和秸秆覆盖的生产效应
Influences of Rape Intercropping with Chinese Milk Vetch and Straw Mulching on Productive Benefits in Dryland of Southwest China
摘要
Abstract
In dryland of the southwest of China,the eco-environment of farmland is extremely fragile,and the application of green manure is not enough.The seasonal drought is a key factor limiting the rape production.In order to improve rape yield and explore the application method of green manure,we compared the effects of intercropping and straw mulching on photosynthetic characteristics,agronomic traits,biomass,root morphology,rapeseed quality and yield.Intercropping Chinese milk vetch and straw mulching substantially improved the agronomic traits (diameter of root crown,leaf number,effective branch number and number of pods per plant),the root morphology (total root length,total root volume,total root surfarea and average root diameter),and the biomass of root,stem and leaf at stem elongation,flowering and podding stages of rape.At the same time,it also increased the photosynthetic rate at seeding stage.Water use efficiency in intercropping treatment and straw mulching treatment was increased by 31.12％ and 39.89％ as compared with rape monoculture.In addition,treatments of intercropping,straw mulching and intercropping with straw mulching significantly increased rape yield by 10.30％,13.20％,and 40.16％ as compared with rape monoculture.Our findings revealed that intercropping Chinese milk vetch and straw mulching are helpful to improve the agronomic trait,biomass and root morphology,resulting in yield increase in rape.关键词
绿肥/间作/根系互作/根系形态/油菜产量Key words
green manure/intercropping/root interaction/root morphology/rape yield引用本文复制引用
周泉,王龙昌,马淑敏,张小短,邢毅,张赛..西南旱地油菜间作紫云英和秸秆覆盖的生产效应[J].作物学报,2018,44(3):431-441,11.基金项目
本研究由国家公益性行业(农业)科研专项(201503127)和国家自然科学基金项目(31271673)资助.This study was supported by the Special Fund for Agro-scientific Research in the Public Interest (201503127) and the National Natural Science Foundation of China (31271673). （农业）
