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小滿已至,麥粒漸滿 灌溉防汛,缺一不可

2018-05-21 16:32:01 來源:中國農(nóng)機(jī)網(wǎng)整理發(fā)布 閱讀量:25006 評論

導(dǎo)讀:“四月中,小滿者,物至于此小得盈滿?!?月21日前后正是小滿,隸屬夏季的第二個(gè)節(jié)氣,也是夏季節(jié)氣中升溫速度快的一個(gè)。

  【中國農(nóng)機(jī)網(wǎng) 市場行情】“四月中,小滿者,物至于此小得盈滿。”5月21日前后正是小滿,隸屬夏季的第二個(gè)節(jié)氣,也是夏季節(jié)氣中升溫速度快的一個(gè)。
 
  夏熟作物的籽粒開始灌漿飽滿,但還未成熟,只是小滿,還未大滿。每年5月20日到22日之間視太陽到達(dá)黃徑60°時(shí)為小滿。這時(shí)中國北方早稻開始結(jié)穗,在禾稻上始見小粒的谷實(shí)的,南方進(jìn)入夏收夏種季節(jié)。
 
  小滿的含義
 
  小滿之名,其實(shí)有兩層含義:
 
  是與農(nóng)候相關(guān)。“小滿,四月中,謂麥之氣至此方小滿,因未熟也。”指的就是北方麥粒的飽滿程度,四月中旬,全國北方地區(qū)麥類等夏熟作物籽粒已開始飽滿,但還沒有成熟,約相當(dāng)乳熟后期,所以叫小滿。這個(gè)時(shí)候雖然還是夏季,但是卻仿佛已然能夠看到秋季麥?zhǔn)諘r(shí)的情形。
 
  第二則與降水相關(guān)。諺語說:“小滿大滿江河滿”,多用來把“滿”用來形容雨水的盈缺,而小滿時(shí)田里如果蓄不滿水,就可能造成田坎干裂,甚至芒種時(shí)也無法栽插水稻。在小滿節(jié)氣到芒種節(jié)氣期間,南方的暴雨普遍開始增多,降水頻繁。
 
  小滿時(shí)節(jié)的天氣狀況
 
  預(yù)計(jì),未來兩天,南方地區(qū)雨水再起,強(qiáng)降雨集中在西南等地,四川、重慶、湖北西南部、貴州北部等地有暴雨。而在冷空氣影響下,北方地區(qū)將出現(xiàn)降雨降溫天氣,華北、東北等地將迎來小到中雨,氣溫也將明顯下降。這個(gè)時(shí)候,全國普遍進(jìn)入雨季,作物生長旺盛。
 
  小滿時(shí)節(jié),小麥作物即將收獲,中稻全面栽插,農(nóng)事繁忙,農(nóng)民們晴天搶收,雨天搶栽。這個(gè)時(shí)候普遍降水較多,如果此時(shí)北方冷空氣可以深入到我國較南的地區(qū),南方暖濕氣流也強(qiáng)盛的話,那么就很容易在華南一帶造成暴雨或特大暴雨,要做好防汛工作;但同時(shí)還是要注意小滿時(shí)節(jié)也同樣容易出現(xiàn)干旱天氣,做好灌溉工作也至關(guān)重要;在北方還要注意可能出現(xiàn)的陰雨天氣影響小麥?zhǔn)斋@以及氣溫升高造成的干熱風(fēng)襲擊,干熱風(fēng)對開花到乳熟期間的小麥危害極大。
 
  節(jié)氣農(nóng)事忙
 
  在小麥產(chǎn)區(qū),此時(shí)宜抓緊麥田蟲害的防治,預(yù)防干熱風(fēng)和突如其來的雷雨大風(fēng)、冰雹的襲擊。營造防護(hù)林帶、噴灑化學(xué)藥物等都是預(yù)防干熱風(fēng)十分有效的措施,此外,提前施氮肥,灌漿時(shí)控制使用氮肥,基肥里增加磷肥,都有利于小麥灌漿,對防御干熱風(fēng)有一定作用。
 
  對于水稻產(chǎn)區(qū)而言,“蓄水如蓄糧”,因此灌溉防汛工作成為了這個(gè)時(shí)候的重要事項(xiàng)。而為了抗御干旱,改進(jìn)耕作栽培措施、加快植樹造林,還應(yīng)當(dāng)注意抓好頭年的蓄水保水工作。另外,也要注意可能出現(xiàn)的連續(xù)陰雨天氣,對小春作物收曬的影響。
 
  對于蔬菜,要繼續(xù)加強(qiáng)大棚作物培育管理,注意通風(fēng)換氣,特別是雨過天晴,及時(shí)揭膜,降低棚內(nèi)溫濕度。同時(shí),注意加強(qiáng)病蟲防治,做好露地蔬菜瓜果的培育管理,及時(shí)追肥,中耕除草,防病治蟲。
 
  小結(jié)
 
  “夜鶯啼綠柳,皓月醒長空。愛壟頭麥,迎風(fēng)笑落紅。”小滿的到來,帶著將熟未熟的甜蜜,亦包含著對盈滿的期許。
 
  另外,小編也在此提醒,盡量避免午后高溫時(shí)段的戶外作業(yè);戶外或者高溫環(huán)境下的作業(yè)人員做好防護(hù)措施,注意做好防暑降溫工作。
 
  此文由本網(wǎng)整理發(fā)布,部分資料來源:搜狗百科、中國氣象局,如有侵權(quán)或異議請聯(lián)系我們。

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