摘要
2011年在浙北的黄松田上,以高产水稻品种明珠2号为试验材料,研究不同新型增效尿素对水稻产量和氮肥利用率的影响。结果表明,施用普通尿素和海藻尿素时,稻谷产量随氮用量的增加而提高,而施用腐植酸尿素和氨基酸尿素时,中等氮用量(180kgN.hm-2)处理的稻谷产量最高。水稻地上部N总吸收量按下列次序递减:海藻尿素(253.5kgN.hm-2)>腐植酸尿素(242.1kgN.hm-2)>普通尿素(236.8kgN.hm-2)>氨基酸尿素(230.8kgN.hm-2)。N总吸收量和每100kg籽粒需氮量随施氮量的增加而提高,而干物质生产效率、稻谷生产效率、氮素收获指数、养分内部利用效率和氮肥生理利用率则随施氮量的增加而降低。水稻稻谷产量与每100kg籽粒需氮量、干物质生产效率、稻谷生产效率、养分内部利用效率、氮素收获指数之间具有显著的相关性。在本试验条件下,氮用量应当控制在180kgN.hm-2左右。3种新型增效尿素只有在施用中氮用量(180kgN.hm-2)时才表现出比普通尿素更大的增产作用。
A field experiment was conducted to determine the effects of different novel synergistic urea on yield and nitrogen use efficiency of high-yielding rice variety （Mingzhu No. 2） on marine-fluvigenic yellow loamy paddy soil＇in North Zhejiang in 2011. The results showed that rice grain yields in the treatments of common urea and seaweed urea were increased with increasing N rates, but for the treatments of humic acid urea and amino acid urea, the highest yields was obtained in the treatments of medium N rates （180 kg N＇ hm-2）. Total N uptake rates by rice aboveground followed the order： seaweed urea （253.5 kg N-hm-2） 〉 humic acid urea （242. 1 kg N .hm-2） 〉 com- mon urea （236. 8 kg N hm-2） 〉 amino acid urea （230.8 kg N-hm-/）. Total N uptake rates and N demand amounts per 100 kg rice grain increased with increasing N rates, while dry matter production efficiency, rice grain production efficiency, N harvest index, N use efficiency, and internal N use efficiency were decreased with increas- ing N rates. Rice grain yields were fairly correlated with N demand amonnts per 100 kg rice grain, dry matter production efficiency, grain production efficiency, N use efficiency, internal N harvest index （ P 〈 0. 05 ）. In this ex- periment condition, N fertilizer rate of 3 kinds of novel synergistic urea should be controlled at 180 kg N hm-2, at which novel synergistic urea could obtain greater increased yield effect than common urea.
出处
《浙江农业学报》
CSCD
北大核心
2013年第2期333-338,共6页
Acta Agriculturae Zhejiangensis
基金
"十二五"国家科技支撑计划项目(2011BAD11B05)
国家公益性行业(农业)科研专项(201003014
201203030)
关键词
水稻
新型增效尿素
氮肥用量
产量
养分利用率
rice
novel synergistic urea
nitrogen fertilizer rate
yield
nitrogen use efficiency
