[{"data":1,"prerenderedAt":24},["ShallowReactive",2],{"news-cfa61e82385d4014b75678e23c76b1f7":3},{"author":4,"classification":5,"collectionnum":6,"content":7,"createTime":8,"effectivetime":9,"extra":5,"grantor":10,"granttime":9,"homepageimages":5,"id":11,"images":12,"images1":5,"images2":5,"isimmediate":13,"ispush":14,"isread":15,"link":5,"note":5,"orgId":5,"pushtime":9,"pushtype":14,"readnum":16,"sharenum":6,"showorder":17,"showwebsite":14,"source":18,"sourcelink":5,"status":13,"summary":19,"system":5,"thumbnail":20,"thumbnail1":5,"thumbnail2":5,"timer":21,"title":22,"types":23,"updateTime":9},"08b80d56a9174bda87efa07f278efe31","",0,"\u003Cp style=\"text-indent: 2em;\">在棉花高产栽培中，各生育期对棉株长相的要求不同，即苗要健壮，蕾期不陡长，后期不早衰才可获高产。为此，对棉花的追肥一般掌握如下：苗肥要“轻”，蕾肥“控”，花铃肥要“重”，秋后酌情补充。这就是高产棉花的基本施肥原则。\u003C/p>\u003Cp style=\"text-indent: 2em;\">苗肥“轻”。苗期到蕾期棉花吸氮很少，不足10%；但是苗期是磷营养临界期，需磷虽少，可不能缺磷；播种棉花时加施5公斤磷酸二铵作种肥。种肥的入土位置在棉株的侧下方约2厘米处。以磷为主的种肥是供棉花的苗期所需，可促进根系发达，保证幼苗健壮。\u003C/p>\u003Cp style=\"text-indent: 2em;\">蕾肥“控”。保持苗期至蕾期控水控氮和中耕蹲苗，以免形成棉花陡长而埋下祸根。\u003C/p>\u003Cp style=\"text-indent: 2em;\">花铃肥“重”。花铃期是棉花生育最旺盛的时期，需肥多，吸氮多，强度大，这时期的吸氮量占60%。从结铃到吐絮成熟期所需要的磷和钾也占一大半。同时，花铃期常出现群体生育和个体生育的矛盾，高产棉花要抓好水、氮管理，减少花、铃脱落，做到带桃入伏，伏桃满腰，秋桃盖顶的高产特征，在追肥上提出了重施花铃肥和补施盖顶肥的原则。\u003C/p>\u003Cp style=\"text-indent: 2em;\">\u003Cspan style=\"text-indent: 2em;\">花铃期的追肥主要是追加适量氮肥（如10-15公斤/亩尿素），但是在缺钾土壤或基肥中没有施过钾肥的情况下，此次还应追加5公斤氯化钾才好，此时追钾可达到促进棉龄增产的作用。尤其对于那些栽种抗虫棉品种的地块，钾肥的用量要高于普通品种的3成。\u003C/span>\u003C/p>\u003Cp>\u003Cbr/>\u003C/p>","2016-06-15 10:26:25","2016-06-15 10:39:57","7e2681613fe24e929db7446d08b47287","cfa61e82385d4014b75678e23c76b1f7","https://api-tx2.hedadata.com/files/news/20160615/86a4286052d142ad8dd29e1075fef5cd.jpg","2","1","0",726,99,"农民日报","在棉花高产栽培中，各生育期对棉株长相的要求不同，即苗要健壮，蕾期不陡长，后期不早衰才可获高产。为此，对棉花的追肥一般掌握如下：苗肥要“轻”，蕾肥“控”，花铃肥要“重”，秋后酌情补充。这就是高产棉花的基本施肥原则。","\\files\\news\\20160615\\86a4286052d142ad8dd29e1075fef5cd.jpg","2000-01-01 00:00:00","棉花施肥要把握三原则","news",1790158174924]