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滴灌帶介紹及選型注意事項
作者:admin 發布日期:2016/4/18 11:40:30

   滴灌帶是滴灌系統中關鍵的部件,是直接向作物施水肥的設備。其作用是利用滴頭的微小流道或孔眼消能減壓,使水流變為水滴均勻地滴入作物根區土壤中。常見滴灌的帶有單翼迷宮式、內鑲貼片式、壓力補償式等。 


內蒙古滴灌帶

各類灌水器


灌帶選型應考慮以下因素:

 (1)作物種類和種植模式:不同作物需水不同,不同種植模式要求不同。如條播植物,要求帶狀濕潤土壤,濕潤比大。作物不同株行距,對滴頭流量、間距要求也不同。 

(2)土壤性質:對于粘性土適宜選用流量小的滴頭,對于重壤和中壤土,滴頭流量不大于3L/h;對于砂土宜選用流量大的滴頭,以擴大侵潤面積,減少滲漏損失。 

(3)工作壓力及范圍:滴頭都有其適宜的工作壓力和范圍,根據系統需要因地制宜地選用工作壓力。 

(4)流量壓力關系:一般選用流態指數小的灌水器對提高均勻度有利,但有時流態指數小的灌水器流道尺寸也小,或流道尺寸長,抗堵性能差,應綜合考慮。 

(5)灌水器價格:膜下滴灌中,滴管帶比重較大,要選用性價比高的滴管帶,杜絕選用價格低、質量差的滴管帶。

此文關鍵字: 內蒙古滴灌帶  
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