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连作障碍与轮作效应是生产上的重要问题。Plenk(1759)、De.Candolle(1832)、Danbeny(1945)、Uslar(1852)等关于连作障碍机理提出过毒素学说;后经Schrelner(1908)、Piockering(1917)等研究,于1937年Molisch指出了作物间的“相克”(allelopathy)现象,直到1939年Kluus总结归纳了连作障碍的五大因子学说。以后平野、Guenzi及Nishio等对毒素作用作了大量的研究工作;大久、成田等就连、轮作对土壤理化性质的影响进行过分析;还有许多学者研究过连、轮作对病虫、杂草的影响。晚近铃木、成田、Nishio等人开始研究连作土壤与轮作土壤微生物数量和作物根面真菌组成
Continuous obstacles and rotation effect is an important production problem. The theory of toxins has been proposed in Plenk (1759), De.Candolle (1832), Danbeny (1945) and Uslar (1852) for the mechanism of continuous cropping obstacle. After the study by Schrelner (1908) and Piockering (1917) in 1937 Molisch The phenomenon of “allelopathy” among crops until 1939 Kluus summarized the five factors of continuous cropping obstacles. Later, Hirano, Guenzi and Nishio made a great deal of research work on toxins. For a long time, Narita et al. Analyzed the influence of even and rotation on the physical and chemical properties of soil. Many scholars also studied the effects of even- The effect of grass. Recently, Suzuki, Narita and Nishio began to study the quantity of soil microorganisms and the composition of root fungi in continuous cropping soil and rotation