追氮与化控组合对超高产冬小麦产量形成和抗倒性的影响  

Effect of the combination of nitrogen fertilizer and chemical control on the yield formation and lodging resistance of super high-yielding winter wheat

作　　者：程瑞婷[1] 李振丽[1] 李瑞奇[1] 李雁鸣[1] 

机构地区：[1]河北农业大学农学院/作物生长调控河北省重点实验室,河北保定071001

出　　处：《河北农业大学学报》2014年第2期1-7,共7页Journal of Hebei Agricultural University

基　　金：国家科技支撑计划项目"粮食丰产科技工程"(2011BAD16B08)

摘　　要：为明确春季追氮时期与多效唑调控对超高产冬小麦产量形成和抗倒性的影响,2011—2012年度在河北省藁城市以冬小麦品种‘石麦18’为材料,在总施N 240kg/hm2,氮肥基追比为5∶5的条件下进行了起身期追氮+化控、起身期追氮、拔节期追氮+化控、拔节期追氮4个不同组合的比较试验。结果表明:拔节期追氮并化控,能够提高叶面积指数,提高分蘖成穗率,增加穗数和粒重,提高产量;并显著缩短了基部1、2节间长度,小麦生育后期的茎秆壁厚、茎秆充实度和机械强度显著增加,抗倒指数显著提高。结果表明,在总施N 240kg/hm2,氮肥基追比为5∶5的条件下,拔节期追氮并结合多效唑调控是河北省超高产冬小麦增产兼顾抗倒的有效途径。In order to explore the effect of PPs33 control on yield formation and lodging resist- ance of super high-yielding winter wheat in spring nitrogen topdressing stage, the authors con- ducted four different combinations of the comparative tests with the ‘Shimai 18 ＇ at Gaocheng city of Hebei in 2011--2012, namely nitrogen fertilizer with and without chemical control in double edges stage and jointing stage separately, in which the total application of nitrogen was 240 kg/hmz and the basal-topdressing ratio was 5 ： 5. The results showed the leaf area index （LAI）, percentage of spike formation and tiller, panicle number, grain weight and yield were all increased by the method of nitrogen fertilize with chemical control in jointing stage, mean- while the first and second internodes length of stem base was reduced and thickness, filling de- gree and mechanical strength of stem and lodging resistance were improved obviously. The comprehensiveresearch results indicate that with the total application of nitrogen 240 kg/hm2 and the basal- topdressing ratio 5： 5, nitrogen fertilizer with the application of PP333 in the jointing stage is the effective way to improve the yield and lodging resistance of super high-yielding winter wheat in Hebei province.

关 键 词：追氮时期 多效唑 超高产冬小麦 群体动态 产量 抗倒性 

分 类 号：S512.11[农业科学—作物学]