Diels in different development stages from zhangxian of gansu province was studied by simulating the way of rain eluviation .
以甘肃省漳县当归为材料，模拟雨水淋溶途径，研究了当归不同发育期的化感作用。
Therefore , autotoxicity was one of the factors leading to succession cropping obstacle , and rain eluviation was an important way of autotoxic chemicals releasing .
