麦后直播短季棉密度及叶龄模式化控试验.pdfVIP

安徽农业科学，Journal of Anhui A ．Sci．2008，36(16)：6729—6730 责任编辑 张彩丽 责任校对 傅真治 麦后直播短季棉密度及叶龄模式化控试验 陈传印 (商丘职业技术学院，河南商丘476000) 摘要 [目的]为中棉所50麦后直播及高产高效种植提供配套栽培技术。[方法]设密度和缩节胺用量2个因子，共6个处理组合，重复 3次，初花期每公顷追施磷酸二氨225 ，后期叶面喷施10％尿素液和1％硫酸二氢钾补充施肥。[结果]试验表明，中等以上肥力麦田， 麦收后及时整地，施足基肥，直播短季棉中棉所50，留苗密度l2万～l5万株／ ，采取叶龄模式全程化控，DPC用量l43．5 h ，每公顷 皮棉产量超过 1 500 kg，霜前花率92．3％。[结论]早期化调有利于促进花芽分化，降低果枝节位。 关键词 短季棉；密度；叶龄模式化控 中图分类号 $562 文献标识码 A 文章编号 0517—66l1(2OO8)16—06729—02 Exl~rmtent of Density and Chemical Conlrol of Leaf Age Model of Short St~l$Oll Cotton Dirt~-Seeded a Wheat Harvest CHEN Chuan-yin (Shangqiu Vocational Technical College，Shangqiu，I{enan钾60Oo) Abstract [Objective]The research aimed to provide the corresponding cultivation techniques f0r the high yield and high efficiency planting of short sea— SOIl cotton di~ct。seeded after wheat harvest．1Methodl Density and PⅨ dosage was setted．for two factors and six treatments combined then in the expefi— ment．During initial bloom stage，the fertilization amount was phosphoric acid 225 kg／hm~，and during late growth stage，the fertilization arr~unt was the liquid of urea 10％，potassium dihydrogen sulfate l％．【Results J In the experiment，short season cotton Zhongmlansuo 50 was direct-seeded on the high fertilized wheat field with planting density 120 000—150 000 plants／hrnz．DPc dosage 1435 g／hm2 、 ． Chemical control of leaf age model was camed out throughout the growth of2hongnaiansuo50、And d1e linl cotton yield Was over l 500 l~／hm2，pre-frost flowering rate was 92．3％．[Conclusion]Early chem— ical regulation Was beneficial to floral bud difforentiation and fruit branch node reduce． Key words Short season cotton；Density；Chemical control of leaf age model 有关短季棉密度和缩节胺化调的研究报道不少l1 J，研究 棉花研究所科贸公司提供脱绒包衣种子。 结果表明，在麦后直播短季棉的农艺措施中，种植密度和缩 1．2 试验设计 试验于2O07年在商丘职业技术学院试验地 节胺