| Cite this article: | 邹丹.不同穗型品种与移栽密度对再生稻再生季产量、发苗能力及干物质积累与分配的影响[J].灌溉排水学报,0,():-. |
| zoudan.不同穗型品种与移栽密度对再生稻再生季产量、发苗能力及干物质积累与分配的影响[J].灌溉排水学报,0,():-. |
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| The Effects of Different Panicle-typed Varieties and Transplanting Density on Yield、The Ability of Seedling Growth 、and Dry Matter Accumulation and Distribution of The Second Ratooning Season of Ratooning Rice |
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zoudan
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Hunan Agriculture University
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| Abstract: |
| Abstract :【Objective】In order to explore the effects of different panicle-typed varieties and transplanting density on the ability of seeding growth and yield in the second ratooning season of ratooning rice.【Method】The split-plot experiment of double factors was designed, the transplanting density was main-plot (D1:1.5×104 hills per hectare, D2:1.875×104 hills per hectare, D3:2.25×104 hills per hectare, D6:2.625×104 hills per hectare, D6:3.0×104 hills per hectare, D6:3.375×104 hills per hectare, the local transplanting habit 2.25×104 hills per hectare as the D6), the panicle-typed varieties was subplot (TYHZ: multi-panicle-type variety; HLY898:the panicle-kernel-type variety; YLY900:the big-panicle-typed variety). 【Result】The response of different panicle varieties to transplanting density are different. The optimal density of both panicle-kernel-type variety HLY898 and multi-panicle-type variety TYHZ are D3 treatment, while there is no significant difference under YLY900. The overall effects of three panicle-typed varieties on the rate of empty hill, dry matter accumulation and distribution, ability of seedling, yield and yield components present HLY898 > TYHZ = YLY900. The yield of HLY898 is significantly higher than the other two varieties and the amount of rise is 6.71%~9.40%. Under different transplanting density, the low and medium transplanting density is the optimum on the rate of empty hill in the second ratooning season of ratooning rice, significantly higher than the D6 treatment, the seedling pile ratio and the highest regeneration seedlings per unit area of D3 treatment is the optimum, significantly better than D6 treatment. The panicle forming ability of D3 treatment and D6 are the optimum, significantly higher than D1, D2 and D6 treatment, the dry matter accumulation of D6 treatment is the optimum, and the harvest index of D3 treatment is the optimum. From the analysis of yield and yield components, D3 treatment has the highest seed setting rate, grain number per panicle and yield, and the yield and grain number of per panicle are significantly higher than D1, D6 and D6 treatment, the amount of rise is 5.4-22.7% comparing to other treatments. Yield、the ability of seedling growth and yield components of panicle-kernel-type variety HLY898 are the optimum, with stronger adaptability. The ability of seedling growth and yield of medium density treatment are significantly higher than other density treatment, and the yield components are more coordinating, which can give full play to the yield potential of the variety to achieve high yield.【Conclusion】the panicle-kernel-type variety HLY898 and the combination of transplanting density of 2.25×104 hills per hectare has the best comprehensive performance and the highest yield in the second ratooning season. |
| Key words: transplanting density;ratooning rice; the secondratooning season ; yield; seedling growth |
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