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for (var i = 0,len = adKeys.length; i 新華社南京9月23日電 題:江蘇南通:濱海鹽堿地變良田 新華社記者朱國亮 在江蘇南通,超過15000畝濱海鹽堿地正逐漸變成旱澇保收的良田。其中,約7000畝已通過驗收,正式成為“噸糧田”,剩余地塊正在改良中,即將驗收。 走進南通市如東掘苴墾區,站在海堤之上,記者看到一邊是一望無際的大海,潮水涌動;一邊是排列規整的“井字田”,稻浪翻滾。 “這里可能是距離大海最近的稻田?!苯K省地質局海洋院總工程師胡建說,“2017年以前這里還是高鹽度濱海鹽堿地,經過改良現已成為‘噸糧田’,可種植上百種作物?!?/p> 南通市通州灣鹽堿地改良示范基地原本也是一片白茫茫的鹽灘。2014年以來,經過土壤改良,這里已變成綠油油的墾區。記者現場看到,稻田里成群的白鷺或覓食或飛舞,草地上遍布牛羊猶如草原牧場,試驗田中各種作物長勢喜人。 2010年,江蘇省地質局開展沿海地質調查;2012年開展濱海鹽堿地土壤特性和鹽分遷移規律研究;2013年萌生并提出改造濱海鹽堿地設想。十年過去,設想變成現實。 “一般一年半,最快一年,我們就能將這些初始鹽度20‰左右的濱海鹽堿地改良成鹽度低于3‰的耕地?!苯K省地質局海洋院副院長姜夏燁說。 目前,在南通市通州灣和如東縣,經江蘇省地質局海洋院改良的鹽堿地超過15000畝,其中約7000畝已通過驗收,正式成為“噸糧田”。 姜夏燁介紹,經測產,改良驗收的田地,種植海水稻,畝產最高可達650公斤;種植小麥,畝產近550公斤;種植油菜,畝產超200公斤,而每畝改良成本僅需3.5萬元。 “目前,改良后的田地,每年主要種植一季小麥、一季水稻,是名副其實的‘噸糧田’?!苯臒钫f,十年來,通過持續的技術維護,改良后的鹽堿地含鹽量穩定,沒有出現大規模返鹽現象。 種田本是農業部門主責,江蘇另辟蹊徑,讓曾經以找礦為主業的地質部門主導濱海鹽堿地改良,集成多種技術,最終取得意想不到的效果。 胡建介紹,江蘇濱海鹽堿地改良主要以地質技術為牽引,無論是前期地質調查、中間土壤改良、后期田間管理,地質監測技術始終貫穿其中,同時集成10余種關鍵技術,實現“以地適種”與“以種適地”的“雙向奔赴”,進而大幅提升改良速度。
江蘇南通:濱海鹽堿地變良田