摘要
为改善作物根系生长微环境,探索根际土壤通透性对作物水分和养分吸收的影响,在3个灌溉水平下(灌水量分别为每次600、400和200ml),采用盆栽玉米不通气、每隔2d通1次气、每隔4d通1次气等处理方法,研究了根际土壤通透性对盆栽玉米生理指标及水分和养分吸收的影响.结果表明:在相同灌水条件下,通气处理促进了玉米株高、叶面积的增长,提高了叶绿素含量;促进了玉米对土壤养分的吸收;显著提高了玉米的根系活力,灌水量为每次600ml时,拔节期每隔4d通气处理的玉米根系活力最大(8.24mg·g-1·h-1),较不通气处理(4.94mg·g-1·h-1)提高了66.7%;根际土壤通气处理对盆栽玉米蒸腾的影响不显著,说明根际通气可提高玉米对水分与养分的吸收利用效率,促进植株生长发育.
Aimed to better understand the significance of soil microenvironment in crop growth,a pot experiment was conducted to investigate the effects of rhizosphere soil permeability on the water and nutrient uptake by maize.Under three irrigation levels（600,400,and 200 ml per pot）,three treatments of soil aeration（no tube aeration as the control,tube aeration every two days,and tube aeration every four days） were installed,and the physiological indices of maize were measured.Under the same irrigation levels,soil aeration increased the plant height,leaf area,chlorophyll contents,promoted nutrient adsorption and increased root vitality markedly.At elongation stage,treatment tube aeration every four days had the highest root vitality（8.24 mg·g-1·h-1） under the irrigation level 600 ml per pot,being significantly higher（66.7%） than that（4.94 mg·g-1 ·h-1） of the control.Soil aeration had no significant effects on the transpiration rate of maize,indicating that rhizosphere soil aeration could raise water and nutrient use efficiency,and improve maize growth.
出处
《应用生态学报》
CAS
CSCD
北大核心
2010年第11期2785-2791,共7页
Chinese Journal of Applied Ecology
基金
国家高技术研究发展计划重点项目(2006AA100214)资助
关键词
盆栽玉米
根际通透性
水分利用
养分吸收
potted maize
rhizosphere permeability
water utilization
nutrient absorption.
