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1大豆重茬引起的减产与解决方法大豆不宜重茬,也不宜与其他豆科作物连作。而阿勒泰地区种植大豆已有十多年的历史,重茬严重,造成植株生长迟缓、矮小、叶色黄,且根系比正茬大豆侧根数减少28%,根瘤减少33%,荚小粒少、产量显著降低,一般减产20%～30%。特别是干旱低肥地区,减产更多。重茬的土壤中有适宜的发病条件,尤以线虫病危害最重,食心虫、蛴螬等虫害也增多。
1 soybean cropping caused by the reduction and solution Soybean should not be cropping, it is not appropriate and other leguminous crops even cropping. However, the planting of soybean in Altay area has been more than ten years old. Severe heavy cropping resulted in slow plant growth, short stature and yellow leaf color. Root root number decreased by 28%, root nodule reduced by 28%, root nodule decreased by 33% Reduce the general reduction of 20% to 30%. In particular, drought and low-fat areas, yield more. Stubble soil in the appropriate conditions of onset, especially the most serious nematode disease, moth worms, mulberry and other pests also increased.