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稗草生长快,吸肥力强,据我们去年在插秧后5天检查,禾苗每株平均发根1.8条,根长2.1厘米,而稗草平均发根3条,根长3.5厘米;在抽穗时检查,稗草根数等于禾根的1.2倍,因此禾苗生长争不过稗草,对产量影响很大。去年我们在兴安县洲上公社试验,每蔸禾有10苗,如混有一株稗草,禾少一苗的,全蔸总粒数减少32.8%;如混有2株稗草,禾少2苗的,粒数减少44.9%;如混有3株稗草,禾少3苗的,粒数减少52.6%.消灭稗草的主要办法是建立种子田,播
Barnyardgrass fast growth, strong absorption of fertility, according to our inspection 5 days after transplanting last year, average seedling seedlings per plant 1.8, 2.1 cm root length, and barnyard grass average root 3, root length 3.5 cm; at heading Check, barnyard grass roots is equal to 1.2 times the number of seedlings so competition for barnyard grass, a great impact on the yield. Last year, we Xing’an County Island commune trial, each crop Wo 10 seedlings, such as mixed with a barnyard grass, a seedling less, the total grain number decreased 32.8%; if mixed with two barnyard grass, Wo less 2 Seedlings, the number of grains decreased by 44.9%; such as three mixed with barnyard grass, seedlings less 3 seedlings decreased by 52.6% The main method to eliminate barnyard grass is to establish seed fields, sowing