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【今日立夏】夏日初長,綠肥紅瘦│農作物進入生長旺季
2022-05-05
10:14:14
來源:農機網整理發布 閱讀量:29778
評論
【農機網 科技創新】 今天是立夏節氣,是二十四節氣中的第7個節氣,也是夏季的第一個節氣。立夏表示告別春天,是夏天的開始,是標示萬物進入旺季生長的一個重要節氣。
立夏以后,正式進入雨季,雨量和雨日均明顯增多。夏季是許多農作物旺盛生長的最好季節,充足的光照和適宜的溫度以及充沛的雨水給植物提供了所需的條件。 由于我國幅員遼闊、南北跨度大,各地節律不一。“立夏”前后,中國只有福州到南嶺一線以南地區可能進入夏季,而其余大部分地區還處在春季,在東北和西北的一些地區,這時候甚至才剛剛進入春季。
進入立夏節氣以后,在長江中下游和華南,5月中旬的雨量迅速增大,而此時的華南,也進入了前汛期的盛期,此時的暴雨往往具有時間上的連續性、地域上的廣闊性和強度上的猛烈性特點,在兩廣的珠江水系和福建的閩江水系,年最高水位往往出現在這一時段,民間有"立夏、小滿,江滿、河滿"的說法。立夏時節,全國大部分地區平均氣溫在18—20℃上下。這時華北、西北等地氣溫雖然回升很快,但降水仍然不多,加上春季多風,蒸發比較強烈,天氣十分干燥。
立夏前后,水稻栽插及其他春播作物的管理進入大忙季。中稻播種要抓緊掃尾,冬小麥揚花灌漿,油菜接近成熟,夏收作物年景基本定局。
水稻管理:加強水稻田的水肥管理,對未夠苗的早稻,田間要保持淺水層,并適時施肥,促進其生長,提高有效分蘗數;對已夠苗的早稻要及時排水露、曬田,控制無效分蘗。
小麥管理:應根據田塊的墑情,適時對小麥田進行灌水。另外,由于立夏后地溫逐漸攀升,田間的雜草會迅速瘋長,因此,還要抓緊時間進行除草。
蔬菜管理:蔬菜作物要加強田間管理,適時施肥、除草和松土,以利生長。
果樹管理:做好保花保果和花后病蟲害防治,及時施足采前肥,適時采摘,夏季要及時進行疏果、套袋和追肥等工作。
畜牧管理:氣溫升高時要注意畜禽舍的降溫通風,強化定期消毒,加強蚊蠅滅除,做好疾病預防和控制工作。
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