农得时使用剂量对水稻经济性状的影响

Effect of Londax on Economic Characteristics of Rice

农得时具有显著的除草效果，除草1次可节省工时14个。但撒施剂量过大，对水稻的分蘖、穗分化、株高、穗长、穗粒重、穗粒数等经济性状都有不同程度的影响，使其逐渐变劣。试验结果表明，农得时施用剂量以195－270g／hm2为宜；在杂草含量（稗草、眼子菜）相对高的地块，应和其他杀草剂混用。

Londax has significant effect on weed control. The test shows that 14 worktimes can be saved by using londax one time. With the increase of the level of dosage, the economic characteristics of rice,such as tillering, ear differentiation, plant height, ear length, seed weight per ear and seed number per ear become worse. The suitable applcation dosage of londax is 195~270g/ha. In the field containning high level of bamyard and potamogeton grasses, londax should be used with other herbicides.