干旱区生态环境知识资源中心(Arid): 滴灌湿润比对成龄库尔勒香梨树根系分布的影响

Arid

	滴灌湿润比对成龄库尔勒香梨树根系分布的影响
其他题名	Effects of Wetted Percentage on the Root Redistribution of Mature Korla Fragrant Pear Trees under Drip Irrigation
	晏清洪 1; 王伟 2; 任德新 3; 武阳 1; 马英杰 4; 黄兴法 1
来源期刊	灌溉排水学报
ISSN	1672-3317
出版年	2011
卷号	30 期号:2 页码:63-67
中文摘要	在充分灌溉条件下采用3种滴灌湿润比（20%、40%、60%）,以漫灌为对照,研究库尔勒成龄香梨吸水根（根直径≤1 mm）在070 cm土层内分布的变化,探讨滴灌湿润比对根系分布的影响。结果表明,漫灌成龄库尔勒香梨树吸水根水平方向上在距树体12 m内从树行由内向外呈递增趋势;垂直方向上根系随深度呈递增趋势。滴灌对成龄库尔勒香梨树根系分布具有显著的影响:水平方向上吸水根有向滴灌湿润区集中的趋势,并且湿润体内的根系密度随滴灌湿润比增大而递增;非湿润体内,吸水根系数量减少,根系密度随滴灌湿润比增大呈递减趋势。垂直方向,滴灌湿润区吸水根有向2040 cm土层集中的趋势,其中湿润比20%趋势最明显,湿润比60%次之,湿润比40%影响最小。成龄库尔勒香梨在由漫灌改为地表滴灌初期,滴灌湿润比采用40%较合适。研究结果对库尔勒成龄香梨滴灌系统的设计和管理具有一定的指导意义。
英文摘要	The wetted percentage was an important parameter for drip irrigation design,for the purposes of improving water use efficiency while maintain normal tree growth.The distribution of fine roots（diameter≤1 mm） of mature Kolra fragrant pear trees as affected by wetted percentage was investigated is studied under sufficient drip irrigation.The soil samples were taken from different soil layers to get root samples.The wetted percentages included 3 levels as 20%,40% and 60% with flood as control.The results showed that,under flood irrigation,the fine roots increases with the distance from tree trunk within 1 to 2 m.In the vertical direction,the density of fine roots increased progressively with soil depth,with highest root density of 2.9 mm/cm3 at 4070 cm soil layer.Compared with that under flood irrigation（the control）,the fine root distribution under drip irrigation treatments was readjusted.In the horizontal direction,the more fine roots were found in wetted zone under the drippers.This showed the absorption of roots to soil water.This indicates more water absorbed from the wetted zones which can reduce deep percolation of water and evaporation so as to improve water use efficiency.In the vertical direction,the fine roots concentrated in the 20 to 40 cm soil layer.Most obvious readjustment of root distribution was found under 20% treatment,followed by those under 60% and 40%.In conclusion,at the initial stage when the irrigation of mature Kolra fragrant pear trees is shifted from flood irrigation to drip irrigation in arid area,the wetted percent of 40% is more appropriate.The results had a certain significance to guide the drip irrigation system design and management for mature Kolar fragrant pear.
中文关键词	滴灌 ; 湿润比 ; 成龄库尔勒香梨 ; 吸水根 ; 分布 ; 根系密度
英文关键词	drip irrigation wetted percentage mature Kolra fragrant pear fine roots root redistribution root density
语种	中文
国家	中国
收录类别	CSCD
WOS类目	AGRICULTURAL ENGINEERING
WOS研究方向	Agriculture
CSCD记录号	CSCD:4196827
来源机构	新疆农业大学 ; 中国农业大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/226672
作者单位	1.中国农业大学水利与土木工程学院, 北京 100083, 中国; 2.中国农业大学工学院, 北京 100083, 中国; 3.巴音郭楞蒙古自治州农业科学研究所, 库尔勒, 新疆 100083, 中国; 4.新疆农业大学水利与土木工程学院, 库尔勒, 新疆 841000, 中国
推荐引用方式 GB/T 7714	晏清洪,王伟,任德新,等. 滴灌湿润比对成龄库尔勒香梨树根系分布的影响[J]. 新疆农业大学, 中国农业大学,2011,30(2):63-67.
APA	晏清洪,王伟,任德新,武阳,马英杰,&黄兴法.(2011).滴灌湿润比对成龄库尔勒香梨树根系分布的影响.灌溉排水学报,30(2),63-67.
MLA	晏清洪,et al."滴灌湿润比对成龄库尔勒香梨树根系分布的影响".灌溉排水学报 30.2(2011):63-67.