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揚州發布2022年秋播基礎分析及冬前田管技術意見

2022-11-29 09:04:22 來源:江蘇省揚州市農業農村局 閱讀量:14761 評論

  【農機網 地方農機】今年江蘇省揚州市秋播受水稻成熟期推遲以及稻谷收購價格不穩定等因素影響,整體秋種進度偏慢,比常年推遲一周左右。但土壤墑情適宜,利于機械操作,秸稈還田質量較高。秋播期間氣溫較高,利于小麥出苗和油菜生長,播種質量總體較好。
 
  一、生產特點與存在問題
 
  1、種植面積穩中有升。由于揚州市委、市政府高度重視糧食生產,多次赴各地調研秋收秋種,層層壓實責任,確保了小麥種植面積不減少和油菜擴種任務完成。據各縣(市、區)調查初步統計,今年秋種糧食面積272.1萬畝,其中小麥播種面積266.1萬畝,比上年增加2.0萬畝;油菜播栽面積27.6萬畝,較上年增加3.0萬畝,其中育苗移栽面積19.1萬畝,直播油菜面積8.5萬畝。
 
  2、主體品種較為突出。受小麥市場價格的影響,小麥品種類型應用上,強筋小麥應用面積不斷擴大,弱筋小麥種植面積有所減少。揚州市小麥266.1萬畝,其中強筋小麥99.7萬畝,較上年增加17萬畝,占小麥面積 37.5 %;中筋小麥112.0萬畝,占小麥面積 42.1 %;弱筋小麥54.4萬畝,占小麥面積20.4%。具體品種應用上,鎮麥12號種植面積63.8萬畝,成為揚州市第一大品種。寧麥13第二大品種,種植面積46.1萬畝。揚輻麥4號、揚麥25、揚麥23、鎮麥15種植面積分別為16.1萬畝、16.6萬畝、16.6萬畝和13.7萬畝。油菜品種全部實現雙低優質化,以灃油737、浙雜903為主,種植面積分別為6.4萬畝和6.3萬畝。
 
  3、遲播晚播面積大。受水稻成熟遲以及部分大戶“養老稻”的習慣,水稻收獲進度較慢,導致全市小麥播種偏遲,播種期拉長。據統計,揚州市小麥在適播期11月5日前播種面積只有68.5萬畝,占比25.7%,比上年減少41.8萬畝;11月6日~15日播種面積為106.2萬畝,占比40%,與去年上當;晚播面積(遲于適播期10天以上)91.4萬畝,占比34.3%,截至11月22日,仍有63.2萬畝小麥未播。全市油菜播栽進度正常,與上年相當,于11月5日播栽基本結束,其中直播油菜10月20日已基本播種完畢,播栽期集中,適期播栽面積達23.5萬畝,占油菜總面積的90%左右。
 
  3、苗情不平衡性大。今年秋播土壤墑情適宜,有利于各地充分發揮機械作業優勢,耕翻和旋耕整地面積252萬畝,機條播與機撒播(含帶裝撒播)面積225萬畝,播后鎮壓面積241萬畝。封閉化除面積100萬畝,比上年增加40萬畝。播種量平均每畝17.2公斤,較上年減少0.3公斤。藥劑拌種面積進一步增加,面積142萬畝。秋播期間溫度較高,墑情適宜,利于出苗、齊苗,截止11月22日,已出苗面積148萬畝,基本苗23.3萬/畝,適期早播小麥已達3葉,比去年增0.3萬,但未出苗和未播面積118萬畝,苗情差異較大。
 
  二、冬前田管技術意見
 
  針對今年秋播特點和存在的突出問題,一方面要做好搶播掃尾工作,另一方面要突出抓好一種就管工作,加強冬前田間管理,搶早促壯,以壯苗越冬為主攻目標,抓好技術措施落實。
 
  1、搶收搶種,寧遲勿爛。關鍵突出搶字,近日持續降雨天氣,更不利于秋收秋種,各地要抓住晴好天氣,盡快搶收搶種。當前小雪已至,氣溫隨時驟降,晚播小麥容易發生凍害,但寧可晚,也不能爛耕爛種。對地勢低洼以及土壤黏重滲水比較慢的地塊,有積水的要抓緊組織挖溝排水;沒有明水但土壤含水量大的要盡快每隔2~3米開挖20~30厘米的瀝水溝瀝水散墑,或者用深松犁深松30~40厘米散墑,盡快適墑播種。
 
  2、清溝理墑,適度鎮壓。各地要趁晴好天氣開好墑溝,每3~4 m開挖一條豎溝,距田兩端橫埂2~5 m各挖一條橫溝,較長的田塊每隔50 m增開一條腰溝,及時清溝理墑,確保內外三溝相通,做到雨止田干,提高麥油抗漬能力。對稻草還田量較大、表土層煊松的麥田要適度鎮壓,確保根土密接,提高保墑防凍能力。適度鎮壓應掌握在日平均氣溫 3℃以上、墑情適宜(表土干白) 時進行。
 
  3、早施苗肥,壯苗越冬。在小麥2葉1心時,及時追施苗肥,畝施尿素10公斤左右。對于遲播田塊,于1葉1心時及時追施苗肥,畝施尿素7.5公斤左右。促進分蘗早生快發,力爭壯苗越冬。對有旺長趨勢的小麥,應在冬前搶晴暖天氣適度鎮壓,噴施矮壯豐、矮苗壯或多效唑等化控試劑進行適當化控。對苗體較小的油菜畝追施尿素7~8公斤,對于生長較旺的油菜畝用15%多效唑或5%烯效唑30-40克噴霧化控,控上促下,增強植株耐寒性。
 
  4、適溫化除,防除草害。未能及時封閉化除或效果不好的田塊,要根據田間草相選準藥劑,搶晴暖溫高天氣(日平均氣溫5℃以上),用藥搞好冬前化除,寒潮來臨前 3~5 天、后 5~7 天不宜化除。以日本看麥娘為主,選用7.5%啶磺草胺水分散粒劑,在麥苗3~6葉期均勻噴霧;以硬草、菵草為主,選用異丙隆可濕性粉劑,于麥苗3葉期均勻噴霧。
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