摘要
本研究采取在五个生态区设置 9圃固定轮作区与相应生态区生产地块调查相结合的方法 ,研究大豆迎茬 ,重茬一年、二年、三年对大豆生育 ,叶面积指数、干物质积累 ,构成产量因子及产量与品质的影响。三年研究结果表明 ,重、迎茬大豆均较正茬大豆减产 ,减产幅度随重、迎茬年限增加而加剧。以迎茬减产最少为 6 .1 % ,重茬一、二、三年分别减产 9.9% ,1 3.8%和 1 9%。不同生态区减产程度不同。重迎茬对大豆生育 ,干物质积累及构成产量因子的影响与对产量的影响有相同趋势。重迎茬对大豆子实商品品质的影响较大 ,主要是百粒重降低 ,病粒率与虫食率增加 ,使大豆商品品质降低。对化学品质的影响在本研究周期中 (指重茬三年 )
The study was conducted at nine fixed rotation plots in five ecologic regions. The purpose is to study the influence of soybean alternate, two, three and four years successive cropping on soybean growth, leaf area index, dry matter accumulation, yield characters yield and pod quality. The results of three years showh that the soybean yield of successive and alternate cropping decreased in comparson with that of normal on more cropping. The more the years of successive and alternate cropping the more the soybean yield reduction. Yield reduction of alternate, tow, three and four years successive cropping are seperately 6.1 , 9.9, 13.8 and 19% less than normal rotation. The yield reduction of alternate cropping is the least among them. The level of yield reduction is various in different ecologic regions. The influnce trend of successive and alternate cropping to soybean growth, dry matter accumulation,yield characters is the same as those to yield. Successive and alternate cropping have a significant effect on soybean commodity quality, such as, lower 100-seed weight, higher percent disease seeds and damaged seeds by insects, which cause commodity quality of soybean to become lower. The obvious influence of successive and alternate cropping on chemical quality had not been found in this study.
出处
《大豆科学》
CAS
CSCD
北大核心
2000年第3期229-237,共9页
Soybean Science
关键词
大豆
重迎茬
产量
品质
轮作
Soybean
Successive and alternate cropping
Yield
Quality
