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水稻移栽后施用稻糠具有显著的抑草防草效果。施糠量达到100 g/m2时可明显减少稻田杂草发生量,施用量越多杂草发生量越少,即抑草防草效果越大,但当施糠量超过200 g/m2时对水稻有烧苗现象。在移栽后的第4天的杂草干物质重最小,与第16天的相比,秀水11杂草总干物质重减少了18.22 g/m2、汕优10号减少了11.92 g/m2。试验分析表明,施用稻糠后水土层氧化还原电位(Eh)减小和水稻群体茎蘖提前够苗封行是稻糠抑草防草效果的两个主要原因。
Application of rice bran after transplanting rice has a significant anti-weeding and herbicidal effect. When the amount of rice bran reached 100 g / m2, the amount of weeds in paddy field could be significantly reduced. The more the amount of weeds was, the more weed control and weeding effect was. However, when the amount of bran was more than 200 g / m2 Rice has the phenomenon of burning seedlings. The dry weight of weeds was the smallest on the 4th day after transplanting. Compared with the 16th day, the total dry matter weight of Xiushui 11 weed decreased by 18.22 g / m2 and that of Shanyou 10 decreased by 11.92 g / m2. Experimental analysis showed that the reduction of redox potential (Eh) of water and soil layers and the early tillering of seedlings in rice population after rice bran were the two main causes of rice straw weeding and herbicidal effect.