论文部分内容阅读
闽西北是一个地形地势复杂、海拔高低悬殊的山区。常年双季早稻面积在430万亩,一般平均亩产300公斤左右,而在早稻生长期间,特别是分蘖期和抽穗期正处梅雨季节,晴雨交替,温暖高湿的气候条件极利于稻瘟病的发生和蔓延。一、改良品种的利用与现状: 七十年代以来,我区早稻品种经三次更换,第一次更换是在一九七三年至一九七六年以珍汕系统的珍龙13,圭陆矮
Northwest Fujian is a terrain terrain complex, high mountain disparities in the mountains. Perennial double-season early rice area of 4.3 million mu, the average yield of about 300 kg per mu, and during the growth of early rice, especially the tillering and heading are in the rainy season, alternating rain and warm, warm and humid climax conditions extremely conducive to the Occurred and spread. First, the use of improved varieties and the status quo: Since the seventies, the early rice varieties in our region after three replacement, the first replacement is from 1973 to 1976 in the Jane’s system of Zhenlong 13, Gui Lu short