福建农业学报2017，Vol.32Issue(8)：849-853,5.DOI:10.19303/j.issn.1008-0384.2017.08.008
头季氮肥不同施用量对再生稻生长发育及产量的影响
Effects of Nitrogen Fertilization on Growth and Grain Yield of Ratoon-rice, Tianyouhuazhan
摘要
Abstract
A ratoon-rice,Tianyouhuazhan,was used to study the effects of N application rates on the photosynthetic products and grain yield of the first-season and ratoon crops.Five rates of N fertilization,i.e.,N0 at 0 kg · hm-2 (control),N1 at 69.00 kg · hm 2,N2 at 138.00 kg · hm-2,N3 at 207.00 kg · hm-2,and N4 at 276.00 kg · hm-2,were applied on the first crop.The fields were followed with a 160.50 kg · hm-2 application rate for the ratooning.The results showed that higher N fertilizations increased the tiller number,dry matter accumulation,and transporting of storage substances to the grains,but large amount nitrogen use decreased the N agricultural use efficiency (NAUE) on the first crop.The grain yields increased by 12.12％ to 23.35％ over that of N0 due to the fertilizations,with the greatest production achieved by N3.The panicle count and spikelets per panicle increased with the rate increases before reaching N4 level.For the ratoon crop,the increases on grain yield ranged from 1.61％ to 5.54％ as compared with N0.N4 also caused a yield reduction of 4.73％ over control.The panicle count of the ratoon crop decreased with rising N application,while the spikelets per panicle increased.It appeared that a N fertilization of 174.12 kg · hm-2 for the first crop followed by 160.50 kg · hm-2 for the ratoon crop could maximize the combined grain production.关键词
氮/再生稻/生长发育/产量Key words
nitrogen/ratoon-rice/growth/grain production分类
农业科技引用本文复制引用
解振兴,卓传营,林祁,姜照伟..头季氮肥不同施用量对再生稻生长发育及产量的影响[J].福建农业学报,2017,32(8):849-853,5.基金项目
国家重大农技推广服务试点项目(KNJ156004) （KNJ156004）
福建省科技计划项目——省属公益类科研院所基本科研专项(2015R1021-9) （2015R1021-9）
福建省农业科学院青年人才创新基金(2015QC-11) （2015QC-11）
