摘要
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 south double season rice area,We took super middle rice＇Zhongzheyou 1＇as the experiment material,the effect of the rice growth,yield formation and characteristics of nitrogen uptake and utilization were studied under the different nano-meter urea application rate.The results showed that：Under the different nano-meter urea application rate,the characteristics of paddy rice growth,yield formation and the nitrogen uptake and utilization were different;suitable nitrogen application rate was obviously able to promote the tiller occurrence,ear-bearing rate and the glume flower differentiation,guaranteed high LAI and leaf SPAD value,forms the strong photosynthesis productivity,finally forms more biomasses,enhances the nitrogen uptake and utilization efficiency of the super rice,and finally got the higher gain yield.The 225 kg/hm2 nitrogen application rate got the highest yield.The 180 kg/hm2 nitrogen application rate got the highest nitrogen utilization.Consider the factors above the yield and economic cost and nitrogen utilization,180 kg/hm2 nitrogen application rate is the reasonable nitrogen application rate of＇Zhongzheyou 1＇in the double-crop rice area.
出处
《中国农学通报》
CSCD
北大核心
2011年第3期69-75,共7页
Chinese Agricultural Science Bulletin
基金
国家粮食丰产科技工程(2006BAD02A04)
国家农业科技支撑计划(2007BAD87B08)
江西省农科院博士启动金(2009博-1)
中国农科院博士后启动金资助
关键词
纳米尿素
杂交中稻
生长发育
产量
氮素吸收
氮素利用
Nano-meter urea
hybrid middle rice
growth
yield
nitrogen uptake
nitrogen utilization
