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本文采用相关、多元回归及通径分析方法,分析1984年福建16个县杂交早稻威优35、威优64在120块高产田的产量结构诸因素之间的关系,以找出栽培的主攻目标。1985年又进行验证试验。结果如下: 1、威优35、威优64都表现总粒数对产量的直接作用或净作用最大,结实率次之。说明要获得高产,增加总粒数是关键。 2、通径分析表明,威优64以增加有效穗数来提高总粒数的直接作用大,威优35则以增加每穗粒数来提高总粒数的作用大。即威优64在保持一定穗粒数的基础上以增加有效穗数来达到增产,威优35则以保穗数攻大穗来获得高产。 3、威优35的总粒数与结实率的矛盾尖锐。分析结果表明,每公顷355.05万穗,每穗177.9粒可以协调高产,发挥增产潜力。
In this paper, the correlation, multiple regression and path analysis were used to analyze the relationship between the yield structure of 120 high yielding fields in Weiyang 35 and Weiyou 64 in 1984 in Fujian Province, in order to find out the main target of cultivation . 1985 again to verify the test. The results are as follows: 1, Weiyou 35 and Weiyou 64 all showed the direct effect or the net effect of the total grain number on the yield, followed by the seed setting rate. That to obtain high yield, increase the total number of particles is the key. Path analysis showed that the direct effect of Weiyou 64 on increasing the effective panicle number to increase the total grain number was large, while that of Weiyou 35 on increasing the grain number per panicle to increase the total grain number. Wei You 64 to maintain a certain number of grains per spike in order to increase the effective number of spike to increase production, Wei You 35 spike to attack the big ears to obtain high yield. 3, Weiyou 35’s total grain number and the contradiction sharpness. The results showed that 355.05 spikelets per hectare and 177.9 spikelets per panicle could coordinate high yield and exert potential of yield increase.