炔草酯的控草效果和对油菜田间光照、养分、水分及 产量的影响

为明确15%炔草酯WP在油菜田的应用前景，建立油菜田的杂草管理体系，研究了不同开沟深度、不同时期施用15%炔草酯WP对油菜田杂草的控制作用以及炔草酯与其他药剂混用的效果，同时研究了该药剂对田间光照、养分、水分和油菜产量的影响。结果表明，开深沟有利于药效的发挥。在禾本科杂草处于1～2叶期时进行药剂处理，一般可以获得比较理想的除草效果。炔草酯与草除灵混用对禾本科杂草和双子叶杂草都具有良好的防除效果。施用15%炔草酯WP能显著提高油菜田间的透光率，降低杂草对田间养分和水分的吸收。15%炔草酯WP的施用对油菜株高、千粒重没有显著影响，但对油菜第一分枝高度、单株分枝数、角果数影响较大，能显著提高油菜产量。

Weed control effect of Clodinafop - propargel and its influence on the light, nutrition, water and yield of rapeseed

Weed control influencing factors include depth of furrow,the day spraying reagents and their mixture.The influence of 15% clodinafop-proparge WP on the sunlight,nutrition,water and crop yield of rape were studied to evaluate the application prospect of clodinafop-proparge and a weed management system was established in rapeseed fields.The results showed that a deeper furrow was important for weed control.15% clodinafop-propargyl WP had a better control to 1~2 leaf stages of annual gramineous weeds.When grass weeds and broad-leaved weeds both occurred in the fields,the mixed use of clodinafop-propargyl and benazolin-ethyl could achieve better control effects on the whole weed population.The application of 15%Clodinafop-proparge WP significantly improved the light conditions in the rapeseed field and reduced the weed's absorption of nutrition and water.It had no effect on plant height and 1000-seed weight,whereas the height of first branch,numbers of branches and siliquae were markedly influenced,resulting in a significant yield increase of rapeseed.