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本文利用 IR72、汕优 63等材料 ,在云南永胜县涛源乡高产环境下 ,对高产品种的产量及其构成因素分析研究表明 ,高产品种的结实率与产量呈极显著的正相关 ,相关系数为 0 .8181;有效穗与穗粒数呈显著负相关。有效穗、穗粒数、结实率和千粒重对产量的直接效应均为正值 ,其中以结实率的影响力最大 ,直接通径系数为 0 .7979。穗数型、大穗型和中间型的品种 (组合 )均能获得 15t/ hm2 的产量 ,但穗粒协调的中间型品种更易获得 15t/ hm2 的高产。云南涛源获得每公顷 15t以上产量就在于在高水平的穗数群体下 ,仍能协调与穗粒数及产量的关系 ,使得粒数和粒重达到相当的水平 ,1996年汕优 63获得 15.2 7t/ hm2产量的产量结构为 ,每平方米穗数 4 89,每穗实粒数 10 1.4 ,千粒重 30 .7g;桂朝 2号获 15.18t/ hm2 的产量结构为每平方米穗数 4 33,每穗实粒数 12 6.2 ,千粒重 2 7.3g
In this paper, IR72, Shanyou 63 and other materials, in Taiyuan, Yongsheng County, Yunnan Province, high-yielding environments, the yield of high-yield varieties and its constituent analysis showed that the yield of high-yielding varieties and yield was significantly positively correlated Coefficient of 0.18181; effective spikes and grains per spike was significantly negatively correlated. The direct effects of effective panicles, grains per spike, seed setting rate and 1000-grain weight on yield were all positive, of which seed setting rate had the most influence. The direct path coefficient was 0.7979. Spike number, big spike and middle variety (combination) can get 15t / hm2 yield, but the middle grain variety coordinated by spike grain is more likely to get 15t / hm2 high yield. Yunnan Tao source yield per hectare above 15t lies in the high level of spike populations can still coordinate the relationship between the number and grain yield per spike, grain and grain weight to achieve a considerable level, Shanyou 63 in 1996 was 15.2 The yield structure of 7t / hm2 was 4 89 spikes per m 2, 10 1.4 spikes per spike and 30.7 g spikes per 1000 spike. The yield structure of 15.18 t / hm 2 at Guizhao 2 was 4 33 , The actual number of grains per panicle 12 6.2, 1000 grain weight 2 7.3g