四川盆周山区蜀丰108高产结构及增产途径探讨

本文通过对蜀丰108两年盆周山区区试产量结构数据进行多元回归、通径分析。结果表明:蜀丰108亩有效穗数、穗平实粒数二者对产量呈极显著的正线性效应,千粒重未达显著水准;对产量的直接效应以亩有效穗数最大,为0.6814,每穗实粒数次之,为0.4270,千粒重最小,为0.1281。高产栽培必须在增加穗数的基础上,增加每穗实粒数,提高粒重,力争实现亩有效穗22—26万,穗平实粒92—103粒,千粒重25.35—26.77克的产量结构夺高产。

A STUDY ON THE HIGH—YIELD COMPONENTS AND METHODS OF INCREASING YIELD OF THE RICE CULTIVAR"SHUFONG 108" IN THE MOUNTAIN AREA AROUND SICHUAN BASIN

By using the multiple regression and path analysis, the yield components of the area test of the rice cultivar"Shufong 108" for two years in the mountain area around Sichuan Basin were analysied. The results are as follows:(1) The yield was top positively and significantly linear correlated with the effective panicles/mu and average filled grains/panicie, but was not significantly correlated with 1000-grain weight;(2) the direct effect to the yield of the effective panicles/mu, filled grains/pafiicle and 1000-grain weight was respectively 0.6814, 0.4270 and 0.1281. To obtain high-yield, increasing the effective panicles was essential firstly, the filled grains/panicle secondly and grain weight thirdly. The high-yield components were that: the effective panicles/mu, average filled grains/panicle and the 1000-grain weight was respectively 22 to 26 × 10~4 panicles, 92 to 103 grains and 25. 35 to 26. 7g.