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河北省关于印发《河北省2019年冬前小麦苗情分析及冬春季管理技术建议》的通知

2019-12-12 08:40:12 来源:河北省农业农村厅办公室 阅读量:21800 评论

导读:为做好小麦冬春季田间管理,省小麦专家顾问组和省现代农业产业技术体系小麦产业创新团队专家,在前期分区域考察的基础上,于11月28日至30日对保定市定兴县和徐水区、沧州市献县和肃宁县、衡水市景县、邢台市南和县、邯郸市临漳县和成安县、石家庄市藁城区的小麦苗情进行了考察。在认真分析小麦苗情基础上,提出了冬春麦田管理技术建议。

  【农机网 通知公告】 各市(含定州、辛集市)农业农村局,雄安新区管委会公共服务局,厅有关处室、直属事业单位:
 
  现将《河北省2019年冬前小麦苗情分析及冬春季管理技术建议》印发给你们,请结合当地实际,针对可能发生的秋冬连旱,及时制定抗旱预案,突出抓好节水品种和优质强筋品种先进适用技术指导,推进小麦绿色高质高效生产。
 
  河北省农业农村厅办公室
 
  2019年12月6日
 
  河北省2019年冬前小麦苗情分析及冬春季管理技术建议
 
  为做好小麦冬春季田间管理,省小麦专家顾问组和省现代农业产业技术体系小麦产业创新团队专家,在前期分区域考察的基础上,于11月28日至30日对保定市定兴县和徐水区、沧州市献县和肃宁县、衡水市景县、邢台市南和县、邯郸市临漳县和成安县、石家庄市藁城区的小麦苗情进行了考察。在认真分析小麦苗情基础上,提出了冬春麦田管理技术建议。
 
  一、冬前小麦苗情特点
 
  (一)品种布局合理,主导品种突出
 
  今年秋季,全省小麦节水品种推广面积536万亩,近6年累计推广面积达3272万亩;优质强筋麦面积达到405万亩,同比增加45万亩。麦田秸秆还田和播后镇压面积所占比例均达到85%以上,较往年有所提高。
 
  (二)播种技术落实到位,整体播种质量好
 
  尽管今年玉米收获晚于常年3-5天,小麦播期有所推迟,适期播种面积略有减少,但播种技术落实到位,整体播种质量好。据调查统计,全省小麦适期播种面积占72%,10月18日以后播种面积占28%,比去年增加6个百分点。
 
  (三)出苗均匀整齐,基本苗充足
 
  由于加强了对统一供应麦种的检测检验,今年种子籽粒饱满、发芽势强、发芽率高,出苗整齐,缺苗断垄现象有所减少。据调查,全省适期播种麦田亩播量13-16公斤,平均亩基本苗约28万,比去年增加1.5万,晚播麦田亩播量约17.5公斤,亩基本苗约33万,比去年增加1.1万。
 
  (四)群体足个体壮,苗情总体好于常年
 
  与上年相比,一、二类苗比例增加,三类苗比例下降。据农情调度调查,一类苗面积占53%;二类苗面积占41%;三类苗仅占6%。一类和二类苗比例分别比上年提高1个百分点。全省主体麦田亩总茎数70万-80万,群体较为适宜,小麦主茎叶龄为4叶1心至5叶1心,单株茎数3-4个,次生根3-5条,3叶大蘖和次生根数量均显著高于常年。
 
  二、当前存在的主要问题
 
  (一)趁墒播种占比较大,部分地块出现旱象
 
  今年全省趁墒播种面积约占50%,10月11日到11月30日,麦区降水3-18毫米,较常年偏少4-8成。趁墒播种且冬前阶段一直未进行灌溉的麦田土壤墒情明显不足,部分地块小麦出现第一个分蘖空位现象,若不及时进行冬前灌溉,遭受干旱灾害的可能性加大。
 
  (二)部分麦区播量偏大,个别麦田群体偏多
 
  受近几年小麦干旱和冻害等因素影响,近年来在部分地方普遍存在播量偏大的趋势。今年部分地块基本苗偏多,加之播后气温偏高,导致麦苗细弱,少部分播种早的麦田群体在100万以上,呈现旺长趋势,增加了受冻害的机率。
 
  (三)部分麦田土壤塇松、容易失墒,有越冬冻害风险
 
  个别麦田播后未及时进行镇压,造成土壤较塇松,跑墒透气,小麦抗旱、抗寒性能减弱,不利于小麦安全越冬。据气象部门预报,局部麦区有出现低温天气的可能,增加此类麦田发生越冬冻害的风险。
 
  (四)小麦根部病害发生普遍,冬前化学除草面积小,增加了春季杂草防控难度
 
  受干旱因素的影响,今年麦田杂草相对较少,但晚播麦田未能进行“杂草秋治”,增加了春天除草的难度,特别增加了对禾本科麦田杂草的除治的难度。
 
  三、冬前及春季期管理意见
 
  针对我省小麦苗情特点,当前小麦和春季管理应因地因苗制宜,当前管理突出“防冻害、保越冬”,春季应突出“防控土传病害、强化镇压锄划,科学施用肥水”。在具体工作推动上,各地应重点抓好以下措施:
 
  一是抢时浇好冻水。北部麦区和中南部墒情较差麦田、保墒能力差的麦田、旺长麦田要在土壤夜冻昼消时选择白天抢时浇好封冻水,确保小麦安全越冬,土壤封冻后禁止浇水,以防产生冰层导致小麦窒息死亡
 
  二是实施麦田镇压。针对冬前塇松麦田,在表墒适宜、土壤封冻前选择晴好天气下午进行镇压,踏实土壤,保温保墒,防止冻害。针对冬前未镇压或土壤裂缝较多的麦田,在早春应及时进行镇压,以破碎坷垃、弥合裂缝、提墒保温,促进小麦返青生长。
 
  三是抓好春季节水。只要不是麦田严重缺墒,不要浇返青水或过早浇水,要尽可能推迟春季第一次浇水时间,推迟到小麦起身后期至拔节期。根据降雨和土壤墒情,有选择的浇灌春季第二次水。大力推广水肥一体化节水技术。
 
  四是预防“倒春寒”。密切关注春季天气变化,在强冷空气到来之前及时灌水,调节麦田小气候,同时喷施抗寒调节剂等。一旦发生冻害,要及时追施*化肥,促进受冻小麦尽快恢复生长。
 
  五是防控病虫草害。针对茎基腐病、根腐病、吸浆虫等病虫害可能偏重发生,以及草地贪夜蛾的潜在危害,应做好预测预报,提前制订防控预案,及早准备药剂、药械,大力推行统防统治和绿色高效综合防治技术。春季麦田化学除治禾本科杂草一定注意防治时期,好在小麦返青期6叶以前,且气温稳定在8℃以上时进行,小麦起身以后不能喷施除草剂,严格控制除草剂用量,不与其他杀虫剂杀菌剂混用。对于优质麦田一定注意除草剂药害的风险,小面积试验后无药害再使用。
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