已垦沼泽地大豆重茬缓解措施研究

Study on cushion measures of soybean under contionouscropping sondition of tilled swaqmp land

本文对已垦沼泽地重茬大豆的缓解措施进行研究，结果表明：处理间差异显著（Ｆ＝２８．４１＞Ｆ０．０５＝３．３３），各处理以重茬药肥加钾肥对重茬大豆的缓解作用明显，比重茬对照增产１６．７％，比正茬增产２．３９％。其他处理比重茬对照均有增产，幅度为４．９～１３．５％，与正茬比均减产。幅度－１．３３～－７．９７％。钾肥与重茬药肥两处理量较接近正茬。对根腐病的防效以药肥加钾肥的效果最佳。

The cushion measures of soybean to Continuous Cropping condition on tilled swamp land were studied. The results showed that the difference between treatments was significant (F =28. 4l>Fo.o5=3. 33). The treatment, in which medicine, fertilizer and potassium fertilizer were used together , had the best effect. The yield of it was 16. 7% more than that of continuous soybean without treatment (ck ) and 2. 39% more than that of soybean in normal rotation. The yield of Other treatments were 4. 9～ 12. 5% more than that of continuous soybean without treat- ment and 1.33～7. 97% less than that of soybean in normal rotation. The yields of potassium fertilizer treatment and midicine-fertilizer treatment were near to the yield of normal rotation.