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为了解稗草在水稻生长发育各个时期的危害情况,我站1987年在新界埠乡光明村设计进行了“夹蔸稗对水稻产量损失的测定”,现报道如下:一、设计及测定方法选用前茬空闲田,田土为砂质,肥力中等。栽插品种为“301”,3月28日播种,4月30日移栽。共设计21个小区,以1个小区为对照,其余20个小区分四个组,每组5个小区,对照区秧苗全部无稗草,第一、二、三、四组分别栽夹蔸稗1、2、3、4根。小区面积为0.01亩,水稻秧苗每穴栽5本。在水稻分蘖末期,圆秆拔节期、打苞抽穗期,齐穗期分别拔除各组第1、2、3、4小区稗子,保留各组第5小区不除稗。
In order to understand the damage of barnyardgrass at various stages of rice growth and development, we conducted the “Determination of Yield Loss of Paddy Barnyardgrass on Rice Yield” in Guangming Village, Buxu Township, New Territories in 1987. The report is as follows: 1. Design and determination of method selection Before the crop idle fields, the soil is sandy, medium fertility. Transplanting varieties “301”, March 28 sowing, April 30 transplanting. A total of 21 plots were designed with 1 plot as control and the remaining 20 plots were divided into 4 groups with 5 plots per group. All the seedlings in the control plot were completely barnyard-free, and the first, second, third and fourth groups were planted with barnyardgrass 1,2,3,4 root. Area of 0.01 acres of rice seedlings per plant planted five. At the end of rice tillering stage, the stem stalk jointing stage, budding heading stage and heading stage were respectively removed the weeds in the first, second, third and fourth district of each group.