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扬州发布2022年秋播基础分析及冬前田管技术意见

2022-11-29 09:04:22 来源:江苏省扬州市农业农村局 阅读量:14521 评论

导读:今年江苏省扬州市秋播受水稻成熟期推迟以及稻谷收购价格不稳定等因素影响,整体秋种进度偏慢,比常年推迟一周左右。

  【农机网 地方农机】今年江苏省扬州市秋播受水稻成熟期推迟以及稻谷收购价格不稳定等因素影响,整体秋种进度偏慢,比常年推迟一周左右。但土壤墒情适宜,利于机械操作,秸秆还田质量较高。秋播期间气温较高,利于小麦出苗和油菜生长,播种质量总体较好。
 
  一、生产特点与存在问题
 
  1、种植面积稳中有升。由于扬州市委、市政府高度重视粮食生产,多次赴各地调研秋收秋种,层层压实责任,确保了小麦种植面积不减少和油菜扩种任务完成。据各县(市、区)调查初步统计,今年秋种粮食面积272.1万亩,其中小麦播种面积266.1万亩,比上年增加2.0万亩;油菜播栽面积27.6万亩,较上年增加3.0万亩,其中育苗移栽面积19.1万亩,直播油菜面积8.5万亩。
 
  2、主体品种较为突出。受小麦市场价格的影响,小麦品种类型应用上,强筋小麦应用面积不断扩大,弱筋小麦种植面积有所减少。扬州市小麦266.1万亩,其中强筋小麦99.7万亩,较上年增加17万亩,占小麦面积 37.5 %;中筋小麦112.0万亩,占小麦面积 42.1 %;弱筋小麦54.4万亩,占小麦面积20.4%。具体品种应用上,镇麦12号种植面积63.8万亩,成为扬州市第一大品种。宁麦13第二大品种,种植面积46.1万亩。扬辐麦4号、扬麦25、扬麦23、镇麦15种植面积分别为16.1万亩、16.6万亩、16.6万亩和13.7万亩。油菜品种全部实现双低优质化,以沣油737、浙杂903为主,种植面积分别为6.4万亩和6.3万亩。
 
  3、迟播晚播面积大。受水稻成熟迟以及部分大户“养老稻”的习惯,水稻收获进度较慢,导致全市小麦播种偏迟,播种期拉长。据统计,扬州市小麦在适播期11月5日前播种面积只有68.5万亩,占比25.7%,比上年减少41.8万亩;11月6日~15日播种面积为106.2万亩,占比40%,与去年上当;晚播面积(迟于适播期10天以上)91.4万亩,占比34.3%,截至11月22日,仍有63.2万亩小麦未播。全市油菜播栽进度正常,与上年相当,于11月5日播栽基本结束,其中直播油菜10月20日已基本播种完毕,播栽期集中,适期播栽面积达23.5万亩,占油菜总面积的90%左右。
 
  3、苗情不平衡性大。今年秋播土壤墒情适宜,有利于各地充分发挥机械作业优势,耕翻和旋耕整地面积252万亩,机条播与机撒播(含带装撒播)面积225万亩,播后镇压面积241万亩。封闭化除面积100万亩,比上年增加40万亩。播种量平均每亩17.2公斤,较上年减少0.3公斤。药剂拌种面积进一步增加,面积142万亩。秋播期间温度较高,墒情适宜,利于出苗、齐苗,截止11月22日,已出苗面积148万亩,基本苗23.3万/亩,适期早播小麦已达3叶,比去年增0.3万,但未出苗和未播面积118万亩,苗情差异较大。
 
  二、冬前田管技术意见
 
  针对今年秋播特点和存在的突出问题,一方面要做好抢播扫尾工作,另一方面要突出抓好一种就管工作,加强冬前田间管理,抢早促壮,以壮苗越冬为主攻目标,抓好技术措施落实。
 
  1、抢收抢种,宁迟勿烂。关键突出抢字,近日持续降雨天气,更不利于秋收秋种,各地要抓住晴好天气,尽快抢收抢种。当前小雪已至,气温随时骤降,晚播小麦容易发生冻害,但宁可晚,也不能烂耕烂种。对地势低洼以及土壤黏重渗水比较慢的地块,有积水的要抓紧组织挖沟排水;没有明水但土壤含水量大的要尽快每隔2~3米开挖20~30厘米的沥水沟沥水散墒,或者用深松犁深松30~40厘米散墒,尽快适墒播种。
 
  2、清沟理墒,适度镇压。各地要趁晴好天气开好墒沟,每3~4 m开挖一条竖沟,距田两端横埂2~5 m各挖一条横沟,较长的田块每隔50 m增开一条腰沟,及时清沟理墒,确保内外三沟相通,做到雨止田干,提高麦油抗渍能力。对稻草还田量较大、表土层煊松的麦田要适度镇压,确保根土密接,提高保墒防冻能力。适度镇压应掌握在日平均气温 3℃以上、墒情适宜(表土干白) 时进行。
 
  3、早施苗肥,壮苗越冬。在小麦2叶1心时,及时追施苗肥,亩施尿素10公斤左右。对于迟播田块,于1叶1心时及时追施苗肥,亩施尿素7.5公斤左右。促进分蘖早生快发,力争壮苗越冬。对有旺长趋势的小麦,应在冬前抢晴暖天气适度镇压,喷施矮壮丰、矮苗壮或多效唑等化控试剂进行适当化控。对苗体较小的油菜亩追施尿素7~8公斤,对于生长较旺的油菜亩用15%多效唑或5%烯效唑30-40克喷雾化控,控上促下,增强植株耐寒性。
 
  4、适温化除,防除草害。未能及时封闭化除或效果不好的田块,要根据田间草相选准药剂,抢晴暖温高天气(日平均气温5℃以上),用药搞好冬前化除,寒潮来临前 3~5 天、后 5~7 天不宜化除。以日本看麦娘为主,选用7.5%啶磺草胺水分散粒剂,在麦苗3~6叶期均匀喷雾;以硬草、菵草为主,选用异丙隆可湿性粉剂,于麦苗3叶期均匀喷雾。
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