植物营养与肥料学报2012，Vol.18Issue(1)：18-26,9.
氮肥运筹对四川丘陵区机播套作小麦群体质量及产量的影响
Effects of nitrogen strategies on population quality and grain yield of mechanical sowing wheat under intercropping condition in Sichuan Hilly Areas
摘要
Abstract
A medium-gluten wheat cultivar, Chuanmai 42, was taken as an experiment material, the effects of nitrogen levels and application patterns on population quality and grain yield of strip-relay-intercropping wheat （ half planted compared with sole-cropping wheat） were studied using the split block experiment design. The results show that leaf area index （LAI） of wheat after jointing, and the dry matter accumulation are increased with increase of nitrogen levels, while grain-leaf ratio is increased at first and then decreased, and the ratio reaches its largest value at the nitrogen rate of 180 kg/ha. Simultaneously, the LAI after flowering, the dry matter accumulation per day and grain-leaf ratio are all improved effectively at the dressing ratio of 7 ： 3 （ base fertilizer： jointing fertilizer）. In aspect of yield, spike number and seeds per panicle are increased with increase of niirogen levels, while the earbearing tiller percentage and 1000-grain weight are increased at first and then decreased, and reach their largest values at the nitrogen rate of 180 kg/ha. Simultaneously, the earbearing tiller percentage is improved effectively at the dress- ing ratio of 7：3 （base fertilizer ： jointing fertilizer）. The results of correlation analysis show that the LAI after boo- ting, the dry matter accumulation at booting and the dry matter accumulation per day are significantly correlatedwith grain yield. In the present study, the spike number, number of seeds per panicle and 1000-grain weight are optimal under the nitrogen amount of 180 kg/ha combined with dressing ratio of 7 ： 3 （base fertilizer： jointing fertil- izer） , and the highest grain yield is 4800. 4 kg/ha. The corresponding population indexes under this nitrogen strat- egy are 184.5 × 10^4/ha of the seedling number, 225.3 ×10^4/ha of the spike number, 72. 8% of the spike rate, 4.68 of the highest LAI at booting, 2. 11 of LAI at filling, 3201.2 kg/ha of post-anthesis dry matter accumulation, 9652.5 × 10^4/ha of seeds number and 11. 501 mg/em2 of grain-leaf ratio, respectively.关键词
套作小麦/氮肥运筹/产量/群体质量Key words
relay-strip-intercropping wheat/nitrogen strategy/grain yield/population quality分类
农业科技引用本文复制引用
吴中伟,樊高琼,王秀芳,郑亭,邱康健,杨文钰..氮肥运筹对四川丘陵区机播套作小麦群体质量及产量的影响[J].植物营养与肥料学报,2012,18(1):18-26,9.基金项目
四川省教育厅青年基金(08ZB032) （08ZB032）
四川主要粮食作物丰产高效技术集成研究与示范(2006BAD02A05) （2006BAD02A05）
突破性作物新品种高广高效栽培技术研究(2006YZGG-28)项目资助. （2006YZGG-28）
