1.未种保护行的边行在水稻不同生长阶段,对株高、分蘖枝和秆重以及除谷粒重以外的产量构成因素作了测定。对所有测定的性状,最外面的第一行与第二行有显著差异。即使只在移栽后30天,未种保护行的边行对株高和分蘖枝都有显著作用。在最外面的第二行,除株高、每穗实粒数和穗长外,所有性状都受到显著影响。未种保护行的边行,甚至在生长早期, 1. Ways of unprotected rows In the different growth stages of rice, the components of plant height, tiller and stalk weight and grain weight except grain weight were determined. For all measured traits, there is a significant difference between the outermost first row and the second row. Even at 30 days after transplanting, the unprotected rows had significant effects on plant height and tillering. In the outermost second row, all traits were significantly affected except for plant height, number of grains per panicle, and spike length. Unprotected line of the line, even in the early stages of growth,