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对金优463在赣中北作双季早稻的产量及其构成因素的相关和通径分析表明,穗数/hm2对产量的直接作用和净作用最大,每穗粒数紧次之。当穗数少于36×105/hm2和产量在7 200 kg/hm2以下时,增穗是增产的关键;当穗数多于39×105/hm2和产量在7 500 kg/hm2以上时,关键是提高粒数/穗。还提出了金优463高产的穗粒结构及其栽培策略。
The correlation and path analysis of the yield and its components of Jinyou 463 in double cropping early rice in central Jiangxi showed that the direct effect and the net effect of spikelets / hm2 on yield were largest and the number of grains per spike was the second. When the spike number is less than 36 × 105 / hm2 and the yield is below 7 200 kg / hm2, the key to yield increase is spike. When the spike number is more than 39 × 105 / hm2 and the yield is above 7 500 kg / hm2 Is to increase the number of grains / spike. Also proposed Jinyou 463 high yield spike grain structure and its cultivation strategy.