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本文通过田间试验研究了不同供磷水平对吉林省水稻干物质积累、养分吸收分配及产量的影响。结果表明,施磷可显著提高水稻产量,依据产量(y,kg/hm2)与施磷量(x,kg/hm2)关系建立线性加平台方程得出最高产量的施磷量为106.7 kg/hm2,产量为10 687 kg/hm2。水稻不同生育阶段干物质和磷素的积累和分配趋势一致,P120处理的干物质积累量和磷素于抽穗期后均为最大。施磷可显著提高茎鞘中磷素的转运量,P120处理茎鞘和叶片磷转运量、转运率、籽粒贡献率均为最大。水稻的磷肥偏生产力、磷肥农学利用效率、磷肥当季回收率均随着施磷量的增加呈显著下降的趋势。综合产量与效益、养分吸收及磷肥利用效率等因素,采用最佳经济磷肥用量134.0 kg/hm2较为适宜。
In this paper, field experiments were conducted to study the effects of different P supply levels on rice dry matter accumulation, nutrient uptake and distribution and yield in Jilin Province. The results showed that phosphorus application could significantly increase the yield of rice. According to the linear plus plateau equation based on the relationship between yield (y, kg / hm2) and phosphorus application rate (x, kg / hm2), the highest phosphorus yield was 106.7 kg / hm2 With a yield of 10 687 kg / hm2. The trends of accumulation and distribution of dry matter and phosphorus in rice at different growth stages were the same, and the accumulation of dry matter and phosphorus in P120 were the largest after heading. Phosphorus application significantly increased phosphorus transport in stems and sheaths. Phosphorus transport, translocation rate and grain contribution of P120 to the stem and sheath were the highest. The partial phosphate productivity, the agronomic efficiency of phosphate fertilizer, and the seasonal recovery of phosphate fertilizer all decreased significantly with the increase of phosphorus application rate. Comprehensive yield and benefits, nutrient uptake and utilization efficiency of phosphate fertilizer and other factors, the best use of economic phosphate fertilizer 134.0 kg / hm2 more appropriate.