高产栽培条件下籼稻良种产量组分的研究

１９７８１９９５年，以１７个早、中籼良种为材料，先后进行了３２个高产栽培试验，利用每个试验中较高产处理的产量及穗粒结构资料，研究了高产条件下籼稻良种产量组分，结果表明：①籼稻高产育种侧重提高有效穗数和千粒重；②大穗不是高产的主要指标，因为品种高产最适有效穗数与着粒数呈极显著负相关，即穗子较小的品种可以通过栽培措施增加有效穗数而获得高产；③千粒重稳定性较好，品种间千粒重差异极显著；④结实率受环境条件的影响较大，品种间差异不显著。

STUDY ON YIELD COMPNENTS OF INDICA RICE VARIETIES UNDER HIGHT YIELD CULTIVATION CONDITION

In 1987-1995, the yield components of indica rice varieties under high yirld cultivation condition were studied with 17 rice varieties.The results were shown as follows: 1.The way of high yield breading was through increasing productive panicles and 1000-grain weight; 2.There was a significant negative correlation between panicles and spikelets panicle. Even small panicles may gct high yield pass thtough reasonable cultivation techniques. Large panicle is not the main goal of high yield breading; 3.1000-grain weight have a good stability. But there was a significant differeace in 1000 grain weight among varieties; 4. Seed seeting was affected by environment conditions, but seed seeting was relativelg stable among rice varieties.