棉花根际营养滴灌技术研究初报

The Preliminary Study on the Nutrient Solution Drip Irrigation in Cotton Rhizosphere

研究了棉花根际营养滴灌不同方式和施肥技术。结果表明，与漫灌相比，根际营养滴灌能改善棉田土壤结构和通透性，节水省肥，棉花根系发达，耗水系数低，水分生产效率高，高产高效。土壤容重降低0．1～0．14g／cm3，水分生产效率提高41．2％～52.9％，节水56％，皮棉增产2．3％。75％施肥量根际营养滴灌比全额施肥等量水漫灌增产皮棉14．5％，水分生产效率提高13．6％。

The experiment were conducted to study the nutrient solution (N, P, K) drip irrigation techniques in cotton rhizosphere in 1997. It can improve soil constion, soil aeralation, soil permeability. Save water and fertilizers, lalge root system and lower water consume rate, higher waterusage efficieycy (WUE), get higher lint yield and economy in come. Soil volume weight reduced by 0. 1～0. 14g/cm3, WUE increased by 41. 2% ～ 52.9%, water saved 56%, lint yield increased by 2. 3%compared with the flooding irrigation. The lint yield of the drip irrigation of 75% fertilizers increased by14.5%, and WUE increased by 13. 6% compared with flooding irrigation of 100% fertilizers in samewater volume.