Abstract:

The paper aims to discuss the high-yield cultivation technique of weakly photosensitive hybrid rice ‘Yuanfengyou 86’, we studied 3 cultivation measures of planting density, levels of N and K fertilizer application for weakly photosensitive hybrid rice ‘Yuanfengyou 86’ by using the optimum design, and established the regression models of main agronomic characters, yield and the 3 cultivation measures to analyze the effects of the measures. The results showed that: increasing N fertilizer application could prolong the whole growth period; increasing K fertilizer application could increase the plant height; increasing planting density could increase the effective panicle, increasing K and N fertilizer could also increase the effective panicle; increasing the planting density and N fertilizer application could decrease the grain number per panicle; increasing N fertilizer application could increase the seed setting rate, and the effect of the measures on 1000-grain weight was weak. The main factors affecting yield were N and K fertilizer application, and the optimum measures for high-yield were screened out by computer simulation, the average planting density was 180.5-245.6 thousand clumps/hm ², the application of K₂O was 64.3-116.7 kg/hm ² and the application of pure N was 76.9-137.9 kg/hm ².

Key words: Hybrid Rice, ‘Yuanfengyou 86’, Optimum Design, Effect Analysis, Simulation Optimization