农业机械学报2012，Vol.43Issue(9)：78-84,7.DOI:10.6041/j.issn.1000-1298.2012.09.016
亏缺灌溉对成龄库尔勒香梨产量与根系生长的影响
Yield and Root Growth of Mature Korla Fragrant Pear Tree under Deficit Irrigation
摘要
Abstract
The experiment included four levels of the soil water deficit (threshold of soil water potential before irrigation) applied in the middle period of fragrant pear growth; slight ( - 100 kPa) , moderate ( -200 kPa) , severe ( -300 kPa) water stress and the control ( - 50 kPa). The irrigation system was surface drip irrigation. The results indicated that the water stress irrigation significantly reduced the summer pruning weight, improved the yield. Under full irrigation, the root length density (RLD) decreased with the increment of distance from the tree row, and root development in the wetted zone of drip irrigated pear tree was enhanced. The RLD at 0. 5 m from the tree row decreased with the depth; however, the RLD in the range from 1 m to 1. 5 m from the tree row increased with the depth; in the non-irrigated zone at 2 m from the tree row, the differences of RLD among the depths were not obvious. The RLD in the wetted and non-irrigated zone adjusted significantly due to the water stress in the wetted zone , as compared to the control. Increase of RLD due to the moderate soil water deficit showed some positive effects to the yield improvement.关键词
亏缺灌溉/滴灌/水分胁迫/果实生长/根长密度Key words
Deficit irrigation/ Drip irrigation, Water stress, Fruit growth/ Root length density分类
农业科技引用本文复制引用
武阳,王伟,黄兴法,任德新,苏柳芸,刘正华..亏缺灌溉对成龄库尔勒香梨产量与根系生长的影响[J].农业机械学报,2012,43(9):78-84,7.基金项目
国家科技支撑计划资助项目(2007BAD38B00)和国家自然科学基金资助项目(50879087) （2007BAD38B00）
