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本文对灿粳（亚种）杂交稻赣化７号（５４６０／广抗粳２号）每穗枝粳、颖花分化、退化、结实等穗部性状进行了研究，结果表明：在不同肥料配施（简称施肥法，下同）条件下，赣化７号每穗颖花分化总数为２３３．７～２８１．７朵，退化数和退化率分别为２４．０～４６．４朵／穗和１０．１％～１８．７％，高低相差近二倍，每穗枝梗、颖花退化数、退化率与抽穗期每朵颖花占有干物重（ｍｇ／朵）呈显著的线性负相关或不显著负相关。枝梗颖花结实率、以及其上、中、下部枝梗颖花结实率与抽穗期每朵颖花占有干物重呈显著性正相关。保花肥的施用，能增加抽穗期叶片含氮量和单株干物质积累量，减少枝梗、颖花退花数，降低退化率，提高颖花结实粒和产量水平。
In this paper, panicle japonica, spikelet differentiation, degradation and fruiting per panicle were studied in hybrid rice Ganjian 7 (5460 / Guangkeng 2) of Chanjing. The results showed that in different fertilizers Under the conditions of fertilization, the total number of spikelets per panicle of Ganhua 7 was 233.7-281.7%, the number of degeneration and the rate of degeneration were 24.0-46.4 spikes and spike respectively 10.1% ~ 18.7%, the difference between the height and the height was nearly doubled. There was a significant linear negative correlation between the degeneration number of spikelets, the spikelets of spikelets and the dry matter weight (mg / leaf) of each spikelet at the heading stage No significant negative correlation. The seed setting rate of spikelets and the seed setting rate of spikelets on the upper, middle and lower branches were significantly and positively correlated with the dry weight of each spikelet at the heading stage. The application of bolting fertilizer could increase the nitrogen content of leaves and dry matter accumulation per plant, reduce the number of branches and spikes, reduce the rate of degradation, and increase the yield and grain yield of spikelets.