作物轮作系统土壤淋溶液对大豆、玉米和小麦种子发芽的影响

Effect of Soil Leachates from Different Crop Rotation Systems on Seed Germination in Soybean,Corn and Wheat

用滤纸法测试了不同轮作系统中土壤淋溶液对玉米、大豆和小麦种子发芽及芽生长的影响。结果表明,从种子发芽开始不同作物种子对重迎茬有不同的反应。在供试茬口中,大豆种子在大豆-小麦-玉米(SWC)轮作区土壤淋溶液中发芽率和芽长势均最高,分别为90%和56.7%,在大豆连作12a(S…SS)区却最低;玉米-大豆-玉米(CSC)和大豆-小麦-玉米(SWC)轮作区土壤淋溶液中利于玉米种子发芽和芽生长;玉米-大豆-玉米(CSC)轮作区,或在大豆-小麦-玉米(SWC)茬口土壤淋溶液利于小麦种子发芽,而小麦种子在小麦-大豆-小麦(WSW)和大豆-小麦-大豆(SWS)类似的重迎茬土壤林溶液中发芽不好。图9,参14。

Effect of soil leachates of different crop rotation systems on seed germination in corn,soybean and wheat were tested by filter paper method in this study. The results showed that different responses of crop seeds to the soil leachates from rotation systems occurred. The germination rate of soybean seed was higher (90%) in the soil leachate of Soybean-Wheat-Corn (SWC) rotation system than other rotation systems,and growth vigor was more healthy and stronger (56.7%),it was adverse in soybean continuous cropping for 12 years (S…SS). Corn planted in Corn-Soybean-Corn(CSC) and SWC rotation systems were advantageous to germination and growth vigor. It would be better that wheat seeds were sown in CSC and SWC,but the soil leachates of Wheat-Soybean-Wheat(WSW) and Soybean-Wheat-Soybean (SWS) were not beneficial to germination of wheat seed.