高产田鲁麦22号产量构成优化分析

１９９５～１９９６年对鲁麦２２号小麦亩产５５０ｋｇ以上的２０块高产田进行了分析。该品种亩穗数、穗粒数和千粒重与产量的偏相关系数分别为０．９８８７＊＊、０．９７６７＊＊和０．８６５１＊＊；三因素间偏相关关系分析，亩穗数与穗粒数间有微弱的正相关，但与千粒重间呈极显著的负相关，穗粒数与千粒重间有显著的正相关。通径分析，亩穗数、穗粒数、千粒重对产量的净作用分别为０．７３４３、－０．０５２９和－０．１６４１。表明亩穗数对产量贡献最大，是该品种的主攻方向。通常亩产６００ｋｇ的适宜产量构成为３０．８６～３１．９８万穗／亩、４４．８～４６．８粒／穗、千粒重４８．９～５１．５ｇ

Analysis of Elite Yield Composition of Wheat Var. Lumai 22 in High-yielding Fields

Analysis of 20 fields producing over 8.25 t/ha grain of winter wheat var. Lumai 22 from 1995 to 1996 revealed that the partial correlation coefficients of yield to spike number per hectare (a), grain number per spike (b),and 1000-kernel weight (c) were 0.9887 ** , 0.9767 ** and 0.8651 ** , respectively. There was a light positive correlation between a and b, high significant negotive correlation between a and c, significant positive correlation between b and c. Path analysis showed that the net effects of a, b and c on yield were 0.7341 , -0.0529 and -0.1641, respectively. The results said that the spike number per hectare made a greatest contribution to the yield of Lumai 22, with the suitable yield composition to get 9t/ha being 30.88-31.98×10 4 spikes per mu, 44.8-46.8 grains per spike and 48.9-51.5 g of 1000-kernel weight.