“田普(二甲戊灵)”除草剂对燕麦作物的性状及产量的影响

Influence of Herbicides ‘Tianpu'( Pendimethalin) to the Characters and Yield of Oat

2013年通过对“田普”除草剂在本地常用的6个燕麦品种的试验田里的应用,对使用本除草剂的处理A和未使用本除草剂的处理B及人工锄草的处理C进行比较。结果表明处理A对田块的杂草有明显的抑制作用,株防效为95.51%,鲜重防效为88.03%。处理A与处理B比生物产量和籽实产量的增幅均达到极显著水平（p〈0.01）,与处理C比增幅虽未达到显著水平,但产量明显增加;比较裸燕麦着壳率未见明显增加,均在0.3%~0.4%。除草剂处理的籽实产量与株防效、鲜重防效、穗粒数、穗粒重、千粒重和生物产量都成正相关性,但差异不显著,相关性大小分别是千粒重〉生物产量〉鲜重防效〉株防效〉穗粒重〉穗粒数。2014年试验地块与马铃薯进行倒茬,未见地块对马铃薯造成危害,燕麦与马铃薯倒茬的田块可以使用本除草剂。

By means of the application of herbicide ‘Tianpu'to 6 common oat in the test field,three treatments A( Herbicide treatment),B( No herbicide treatment) and C( Weeding by hands treatment) were compared in 2013. The results show that treatment A can control the weed significantly,the stem control effect is 95. 51% and the fresh and heavy effect is 88. 03%. The grain yield and biomass of treatment A is higher than treatment B significantly( p < 0. 01),although the grain yield and biomass are also higher than treatment C,it is not significantly; The kernels-with-glumes percentage was not increased significantly,average 0. 3%~ 0. 4%. the grain weight of herbicide treatment is positively correlated with stem control effect,fresh and heavy effect,grains per spike,grain weight per spike,1 000 grains weight and biomass,but not significantly.The correlation sequence is 1 000 grains weight > biomass > fresh and heavy effect > stem control effect > grain weight per spike > grains per spike. The rotation of potato in the same field was done in 2014 and no harmful effect was found,so this herbicide can be used in the rotation of oat and potato.