吉林省西部盐碱地老水田栽培技术初探

The Study on the Rice Cultivation Technologies in Old Saline-alkali Soil Paddy Field in Western Regions of Jilin Province

两年试验结果表明:钵体育苗每孔播3粒时比6粒和9粒分别增产3.1%和10%;每穴插秧苗数2～4株时产量最高,比1株和5株高11.1%和9.7%;插秧密小于30 cm×20 cm或大于30 cm×26.7 cm时,减产幅度都显著。所以水稻开发多年的盐碱地水稻田应该改变密植、主穗增产的栽培方法,采取稀植、促进分蘖、大穗增产的栽培技术。

Two years experiments showed that （1） the 3 seeds per bowl treatment increased yield 3.1% and 10% than 6 and 9 seeds per bowl respectively in bowl seedling; （2） transplanted 2 to 4 seedlings per hill leaded to highest yield comparing to 1 and 5 seedlings per hill （increasing yield 11.1% and 9.7%, respectively）; （3） it would significantly reduce the yield when the planting density is lower than 30cm x20 cm or higher than 30cm x26.7 cm. This result suggested that the old cultivation method which increased planting density and depended on the contribution of main panicle to yield should be changed. In saline-alkali soil paddy which planting rice for many years, some cultivation technologies would increase the yield which to reduce the seeding rate, transplanting seedling per hill and planting density.