【摘要】 棉花膜下滴灌技术是近几年在南北疆棉花产区重点推广的农业节水措施。试验和实践证明,此项技术对提高水肥利用率,具有十分明显的作用。酸性液体肥是新研发的一种用于棉花膜下滴灌的新型滴灌专用肥。其有效养分含量为25%,主要以氮、磷、钾、微量元素以及促根剂、促溶剂等成分为主,pH值2～3。经过2年多点试验测定,滴灌酸性液体肥的氮素利用率在47%～66%,平均为55%,与常规灌溉条件下的施肥相比,氮素利用率提高15～30个百分点;磷素利用率在24%～38%范围内,平均为31%,与常规灌溉条件下的施肥相比,磷素利用率提高10～17个百分点;平均增产子棉270kg/hm2,增产率为7 8%。每公顷用肥900～930kg,可生产皮棉1725kg/hm2,节约肥料35%。更多还原

【Abstract】 Drip irrigation under film technology is a comprehensive measure of agricultural saving water. It was extended emphatically in cotton production district of Xinjiang.Acid liquid fertilizer, a type of new special fertilizer for driping irrigation was researched and developed. Its major nutrients including Nitrogen? Phosphorous?Potassium? minor elements and Urge solvents ?Urge the root pharmaceutical etc is 25%, pH 2～3.More than 2 years exprements at plot of different fertility identified the utilization ratio of nitrogen was 47%～66%, average 55%, 15%～30% higher than on normal irrigation and the utilization ratio of phosphorous was 24%～38%,average 31%,10%～17% higher than normal condition. Unginned cotton 270 kg/hm~2 was increased. Its increasing rate was 7.8%.When the fertilier was used 900～930 kg/hm~2 , ginned cotton 1725 kg/hm~2 was produced and 35% fertilizer was saved.更多还原