论文部分内容阅读
在南方双季稻地区,以超级杂交稻‘中浙优1号’为试验材料,研究了纳米增效尿素不同用量对超级杂交中稻生长发育、产量形成及氮素吸收利用特性的影响。结果表明:纳米增效尿素不同施用量条件下,水稻生长发育、产量形成及氮素吸收利用特性不同;适宜施氮量能显著促进超级中稻分蘖的发生,成穗和颖花分化,保证较高的LAI和叶SPAD值,形成较强的光合生产能力,最终形成较多的生物量,提高氮素吸收利用效率,增加产量。此试验以施氮量225kg/hm‘2中浙优1号’产量最高,以180kg/hm‘2中浙优1号’氮肥吸收利用程度最高;综合考虑到产量和经济成本及氮素吸收利用等因素,纳米增效尿素折施纯氮量180kg/hm2是双季稻地区中稻‘中浙优1号’合理的施用量。
In the double cropping rice region of South China, the effects of different dosage of nano - enhanced urea on the growth and development, yield formation and nitrogen uptake and utilization of middle - season hybrid rice under super hybrid rice ’Zhongzheyou 1’ were studied. The results showed that the growth and yield, yield formation and nitrogen absorption and utilization of rice under different application rates of nano-enhanced urea were different. The suitable nitrogen application rate could significantly promote the tillering, spikelet and spikelet differentiation of super rice, Of LAI and leaf SPAD value, forming a strong photosynthetic production capacity, the final formation of more biomass, improve nitrogen absorption and utilization efficiency, increase production. In this experiment, the yield of nitrogen was 225kg / hm’2 Zhongzheyou 1 was the highest, and the nitrogen utilization of 180kg / hm’2 Zhongzheyou 1 was the highest. Considering the yield and economic cost and nitrogen absorption and utilization And other factors, the N application of nano-synergistic urea was 180 kg / hm2, which is a reasonable application rate of Zhongzheyou 1, a middle-season rice in double-cropping rice region.