棉mian花hua的de生sheng長chang特te點dian是shi無wu限xian生sheng長chang,再zai生sheng能neng力li強qiang,株zhu形xing可ke控kong性xing強qiang,需xu肥fei量liang大da。一yi般ban來lai說shuo,足zu夠gou的de肥fei料liao,是shi棉mian花hua高gao產chan優you質zhi的de基ji礎chu。充chong足zu的de磷lin肥fei能neng促cu進jin棉mian株zhu健jian壯zhuang生sheng長chang,增zeng加jia鈴ling重zhong,提ti早zao成cheng熟shu。鉀jia肥fei是shi植zhi物wu體ti內nei多duo種zhong酶mei的de催cui化hua劑ji,能neng促cu進jin光guang合he作zuo用yong和he纖xian維wei素su的de合he成cheng。棉mian花hua的de施shi肥fei技ji術shu是shi:“調氮、增鉀、補磷、噴硼”八字配方施肥法。具體來說,應抓好以下五項技術措施:
一、重視農家肥的施用:nongjiafeinenggailiangturang,peifeidili。gonggeizuowugezhongyingyangyuansu,bingpeiheshiyongyidingshuliangdehuafei,shiduinongjiafeidebuchongyuzengxiao。zaicijichushang,shiyongweifei,huiyouxianzhudezengxiaozuoyong。ruguonongjiafeihuohuafeidebudaomanzu,zeweifeidexiaoguoyebuxianzhu。
二、調節氮肥比例:農民長期偏施氮肥,其結果不僅造成氮素養分的流失與浪費,而且使氮、磷、鉀比例嚴重失調。根據不同土壤地力,將每畝施用氮肥調節到10~15公斤(包括有機肥氮素)。
三、增加鉀肥施用量:棉花從出苗到現蕾吸收鉀素約占整個生育期總量的24%。現蕾到開花約占42%。開花到成熟約占34%。因此鉀肥應基施或現蕾前追施,以利於棉花早期生長,重點滿足蕾、花、鈴生長發育的需要。後期也可葉麵噴施鉀肥(禾豐鉀或磷鉀動力),補充鉀元素。鉀肥用量增加到每畝10~15公斤。
四、補充磷肥:linzaiturangzhongbuyiyidong,qierongjieshifanghuanman,buyibeigenxixishou,suoyilinfeikezuoweijifeishiyong,shiqizaishengyuqianqifashengfeixiao。shengchanzhong,changjiangdanfeiyulinfeihunheshiyong,qifeixiaodadachaoguodandushiyonglinfei。yekezaihouqigenwaizhuifei,yongyouzhilinsuanerqingjia(如新加坡進口的99%磷鉀動力)等葉麵噴施。磷肥用量應補充到20~30公斤。
五、噴施硼肥:chongzudepeng,budankeyicujinhuaqifayu,youliyushoufenhetigaojieshilv,haikeyijiasuzhizhutineitanshuihuahewudeyunshu,zengjiadantaozhongheyifenlv,suoyiyingzaileiqi、初花期、盛花期各噴施一次1000倍禾豐硼溶液。
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