半旱式栽培比常规平作平均增产水稻20～30％,分蘖数、有效穗、着粒数均明显增高,千粒重可高达22.16g。但不同垄距间,水稻产量无明显差异;有效穗、穗粒数、千粒重、剑叶、株高间相互明显制约和补偿。随着垄沟加宽,株高、茎径和粒重各自达最佳状况,而有效穗和穗粒数成为每窝粒重的障碍因子。就平作与半旱式二者的水稻主分量分析而言,第一主分量趋势一致的即增加分蘖数、有效穗来提高实粒数和窝粒产量;第二主分量系数中,半旱式以株高组分为最大;第三主分量系数中,二者趋势相同,均以千粒重为特征 Semi-arid cultivation increased the average yield of rice by 20-30% than that of conventional cultivation, and tiller number, effective spike and grain number increased obviously, and grain weight was as high as 22.16g. However, there was no significant difference in rice yield between different ridge and paddies. The effective spikes, grains per spike, 1000-grain weight, flag leaf and plant height obviously restrained and compensated each other. With widening furrows, plant height, stem diameter and grain weight each attained the best condition, and effective ears and grains per spike became the obstacle factor for the grain weight per litter. In terms of principal component analysis of rice under both flat and semi-dry conditions, the first principal component is consistent with the trend of increasing tillering number and effective panicle to increase the number of real kernels and the yield of litter. In the second principal component coefficient, With the largest component of plant height; the third principal component coefficient, the trend of the same two, are characterized by 1000-grain weight