ass日本风韵熟妇pics男人扒开女人屁屁桶到爽|扒开胸露出奶头亲吻视频|邻居少妇的诱惑|人人妻在线播放|日日摸夜夜摸狠狠摸婷婷|制服 丝袜 人妻|激情熟妇中文字幕|看黄色欧美特一级|日本av人妻系列|高潮对白av,丰满岳妇乱熟妇之荡,日本丰满熟妇乱又伦,日韩欧美一区二区三区在线

溫室水肥滴灌系統(tǒng)迷宮式灌水器堵塞試驗
CSTR:
作者:
作者單位:

作者簡介:

通訊作者:

中圖分類號:

基金項目:

“十二五”國家科技支撐計劃資助項目（2011BAD29B00）,、高等學(xué)校學(xué)科創(chuàng)新引智計劃（111計劃）資助項目（B12007）和水利部引進(jìn)國際先進(jìn)水利科學(xué)技術(shù)計劃（948計劃）資助項目（201436）


Clogging of Labyrinth Emitters in Greenhouse Fertigation
Author:
Affiliation:

Fund Project:

  • 摘要
    • |
  • 圖/表
    • |
  • 訪問統(tǒng)計
    • |
  • 參考文獻(xiàn)
    • |
  • 相似文獻(xiàn)
    • |
  • 引證文獻(xiàn)
    • |
  • 資源附件
    • |
  • 文章評論
    摘要:

    為探明溫室滴灌灌水器堵塞的影響因素及機理,，研究了灌水量和施肥量對灌水器堵塞的影響，并利用場發(fā)射掃描電鏡分析了灌水器內(nèi)的堵塞物質(zhì),。結(jié)果表明,，灌水器平均流量隨著灌水量和施肥量的增加呈下降趨勢，下降幅度在1.51%～14.16%之間。方差分析表明施肥量對灌水器平均流量的影響達(dá)到極顯著水平（P<0.01）。解剖灌水器后發(fā)現(xiàn)堵塞物質(zhì)多沉積在流道前部,。堵塞物質(zhì)主要由生料帶殘渣、微小沙粒和白色粉末狀化學(xué)沉淀物組成,，其中白色粉末主要由鈣,、鎂、碳,、氧、磷元素等組成,。說明本試驗中灌水器堵塞主要是由物理堵塞和化學(xué)堵塞共同作用引起的,。

    Abstract:

    Emitter clogging caused by simultaneous irrigation and fertilization (fertigation) has negative influence on the normal operation of drip irrigation systems. This study was carried out to determine the effects of fertigation amount and irrigation amount on labyrinth emitter clogging. Additionally, sediments in the labyrinth passage were analyzed by field emission scanning electron microscope (FESEM) to determine their composition. Results indicated that average discharge of the emitters decreased between 1.51% and 14.16% with the increase of the irrigation or fertigation amount after operating the drip irrigation system for 21 weeks. Statistical analysis showed that fertigation amount significantly affected emitter average discharge (P<0.01). Dissection of the clogged emitters revealed that the sediments located in the front labyrinth passage comprised primarily of sealing tape, insoluble fertilizer particles, and white powdery chemical precipitation. The chemical precipitation was found to be constituted of carbon, oxygen, phosphorus, calcium, magnesium, and other minerals. Consequently, emitter clogging was mainly caused by the combined effect of physical and chemical clogging.

    參考文獻(xiàn)
    相似文獻(xiàn)
    引證文獻(xiàn)
引用本文

劉燕芳,吳普特,朱德蘭,張燕.溫室水肥滴灌系統(tǒng)迷宮式灌水器堵塞試驗[J].農(nóng)業(yè)機械學(xué)報,2014,45(12):50-55. Liu Yanfang, Wu Pute, Zhu Delan, Zhang Yan. Clogging of Labyrinth Emitters in Greenhouse Fertigation[J]. Transactions of the Chinese Society for Agricultural Machinery,2014,45(12):50-55.

復(fù)制
分享
文章指標(biāo)
  • 點擊次數(shù):
  • 下載次數(shù):
  • HTML閱讀次數(shù):
  • 引用次數(shù):
歷史
  • 收稿日期:2014-01-04
  • 最后修改日期:
  • 錄用日期:
  • 在線發(fā)布日期: 2014-12-10
  • 出版日期:
文章二維碼