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1976—1979年,通过大田和盆栽对油菜根茬的肥田作用进行了研究,结果表明:收油菜后9—20厘米土壤容重比休闲地减少0.05克/厘米~3,孔隙度增大3.6%。油菜根的分泌和根茎为微生物提供了能量和营养来源,比休闲地自生固氮菌高3.7倍,氨化细菌高24.9倍,亚硝酸细菌高2.8倍。同时创造了适合微生物的理化生物学环境。开花期根际自生
From 1976 to 1979, the effect of fertilizing stubble in rapeseed by field and pot experiment was studied. The results showed that the soil bulk density of 9-20 cm soil decreased by 0.05 g / cm ~ 3 and the porosity increased by 3.6%. The secretion and rhizome of rape roots provide the source of energy and nutrition for the microorganisms, which is 3.7 times higher than that of the autotrophic azotobacter, 24.9 times higher than ammoniated bacteria and 2.8 times higher than the nitrite bacteria. At the same time, the physicochemical and biological environment suitable for microorganisms has been created. Flowering rhizosphere self