水稻旱直播种植中,由于杂草的危害而影响了这种栽培方式的推广。为了寻找旱播田的优良除草剂,我们在室内和田间进行了一些探索性的试验,其中丁草胺具有除草活性好,对水稻安全的特点。该药主要通过植物幼芽吸收,其次是根,并在体内传导。为进一步摸清丁草胺在旱播稻品种间和旱播稻与杂草之间的选择性,本文研究了丁草胺在旱播稻和杂草间的选择性比例和选择性程度试验。 Dry planting of rice in the planting, due to the hazards of weeds affected the promotion of this cultivation method. In order to find a good herbicide for dry farmland, we carried out some exploratory experiments indoors and in the field. Among them, butachlor has herbicidal activity and is safe for rice. The drug is absorbed primarily by plant sprouts, followed by roots and is transmitted in the body. In order to further clarify the selectivities of butachlor among upland rice varieties and between upland rice and weeds, we studied the selective ratio and selectivity of butachlor in upland rice and weeds.