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对连续免耕抛秧的稻田 ,分层跟踪测定其理化性状 ,结果表明 :粘质土采用免耕抛秧后 ,各土层的理化性状得到改善 ;中壤土免耕 1年后各土层的物理性状和大部分养分指标改善 ,免耕 2年后 0～ 5cm土层的物理性状和部分养分指标改善、5～ 1 0cm和 1 0～ 1 5cm土层的物理性状及大部分养分含量不如常耕抛秧 ,免耕 3年后各层养分含量及物理性状总体水平均下降。提出在不同土壤类型条件下连续免耕抛秧的时间不同 ,其栽培管理措施也应采取相应的变化
The results showed that the physical and chemical properties of the soil layers were improved after no-tillage and throwing seedlings were planted. The soil layers after one-year no-tillage in medium-loam soil Physical properties and most of the nutrient indicators improved. After 0 years of no tillage, the physical characters and some nutrient indices of 0 ~ 5cm soil layer improved. The physical characters and most nutrient contents of 5 ~ 10cm and 10 ~ 15cm soil layers were not as good After throwing seedlings and throwing tillage for three years, the nutrient contents of all layers and the overall physical properties decreased. It is proposed that the time for continuous no-tillage and throwing seedlings under different soil types is different, and the cultivation management measures should be taken correspondingly