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“桂朝”是一个穗大粒多粒重和生态结构良好的丰产品种。它的出现,早稻产量比七十年代初期是个飞跃。但是,随着栽培代数增加,品种便逐渐分离退化,特别是抗病性衰退。黄厝尾大队采用了纯度较高的“桂朝13号”和以控制分蘖盛期高峰苗数为中心的栽培方法,立足稳中求高,连续3年(1980、1981、1982年)早造亩产超过1160斤(表1)。通过这3年的实践证明:分蘖高峰苗数越多,成穗率越低,病害越严重;分蘖高峰苗数越少,成穗率越高,病害也随着减少。因此,控制分蘖盛期高峰苗数在30—33万苗为中心的栽培措施,具有省本俭药,增强水稻抗病性,减少病害,特别是减少纹枯病和穗颈瘟,提高水稻成穗率,充分发挥“桂朝”丰产性的效益(表2)。
“Gui and Chao” is a high-yielding variety with a good grain weight and ecological structure. Its emergence, early rice production is a leap than the early seventies. However, with the increase of cultivation algebra, the cultivars gradually segregated and degraded, especially the disease-resistant decline. Huangcuowei brigade adopted the pure Guizhao No. 13 and the method of controlling the peak seedling number at the tillering stage as the center. Based on the steady growth, it was built for three consecutive years (1980, 1981 and 1982) Yields more than 1160 pounds per mu (Table 1). Through these 3 years of practice, it has been proved that the more seedling tillers, the lower the ear percentage and the more serious the disease. The smaller the number of tillering peak seedlings, the higher the ear percentage and the lessening the disease. Therefore, the peak tillering peak number of seedlings in the cultivation of 30-33 million seedlings as the center, with the provincial frugal drugs, enhance rice disease resistance, reduce disease, especially to reduce sheath blight and panicle blast, improve rice into Spike rate, give full play to “Gui and Chao” high yield of benefits (Table 2).