Water quality for agriculture
封凍水的作用就是為了在土壤表面形成一層凍土,保護根系,以免遭受呼嘯凜冽的北風侵襲而受凍。
對植物進行灌溉是必不可少的,水分在土壤中如何運移,對科學灌溉非常重要。下面我們以滴灌形式下水分如何運移進行探討。
This manual is written for Irrigation Specifiers and Landscape Architects. Included here are the detailed design steps to specify a grid of Rain Bird XF-SDI Dripline with Copper Shield? Technology, complete with information on:
雖然硼是一種必需的植物營養元素,但過量會產生毒性。由于井水中的過量硼不存在補救措施,因此應在景觀中種植耐硼植物。“不幸的是,你無法對井水采取任何措施來降低其硼含量,因此選擇耐硼植物是明智的選擇。”
Although boron is an essential plant nutrient, excessive amounts can become toxic. Since no remedies exist for excess boron in well water, stick to boron-tolerant plants in the landscape.“Unfortunately, there is nothing you can do to your well water to reduce its level of boron, so selecting boron-tolerant plants is a wise direction to take.”
灌溉水硬度往往由水中溶解的碳酸鹽引起,這種叫暫時硬度;另外還有一部分鈣鎂離子與氯離子、硝酸根離子等形成的鹽叫永久硬度,硬度升高也會導致PH升高;一般加酸可以分解水質引起硬度的碳酸氫根,同時降低PH,是常用的硬水處理手段;地下水中的鐵往往以二價的形式存在,當抽出地表與空氣接觸,二價鐵會氧化成三價或者其他形態形成沉淀,造成水肥設施堵塞。
Understanding and Managing Irrigation Water Alkalinity
Part 2 - Water quality
Irrigation Water and Alkalinity