论文部分内容阅读
玉米根茬还田后，玉米植株２０ｃｍ 以外范围的地上及０ ～４０ ｃｍ 深的土体内玉米根系数量增加显著，０ ～２０ ｃｍ 范围的４０ ｃｍ 以下各土体根系数量有所降低。增施磷酸二铵和硫酸钾，４０ ｃｍ 以下各土体根系数量增加。增施氮肥，１０ ～２０ ｃｍ 的地上及０ ～４０ ｃｍ 深的各土体内根系数量增加。
After the corn stubble was applied to the field, the root number increased significantly in the field above 20 cm and in the soil from 0 to 40 cm. The root number of the soil below 40 cm in the range of 0 ~ 20 cm decreased. With the addition of DAP and KSO4, the root number of each soil under 40 cm increased. With the application of nitrogen fertilizer, the root number increased in the soil of 10-20 cm and in the soil of 0-40 cm depth.