摘要
为探索适宜作物生长的水气环境，在3种土壤水分水平下，采用50％土壤孔隙率的1．6，1．2，0．8，0．4，0五种通气系数等处理方法，研究了根际通气对盆栽番茄生长指标与根系生长，以及水分利用率的影响。结果表明：适宜的土壤水分与适宜的通气量相结合对番茄生长具有显著的促进作用，通气处理促进了番茄植株的生长，提高了番茄的根系活力和水分利用率，当土壤水分为70％一80％田间持水量，通气系数为O．8时，番茄株高日增长率、茎粗、叶面积指数及叶片叶绿素含量分别比对照提高14．34％、22．39％、23．95％、29．98％；根系活力达最大值[13．440m∥（g·h）]，与未通气处理的[8．319mg／（g·h）]比较，增大了61．55％；番茄水分利用率比对照提高了16．97％。
Aimed to explore proper moisture environment for the crop, under three kinds of soil moisture, five treatments of soil aeration （1.6, 1.2, 0.8, 0.4 and 0 tube ventilation quantity of 50% porosity of soil） were installed and the physiological indices of tomato and water use efficiency were studied. The results showed that the adequate combination of soil moisture and soil ventilation quantity could increase the plant growth, root vitality and water use efficiency markedly. Under 70% ~ 80% field capacity and 0.8 tube soil ventilation quantity, the＇ growth rate, stem diameter, LAI and chlorophyll content were 14.34%, 22.39%, 23.95% and 29.98% higher than the control respectively and the root vitality reached the highest value of 13.440 mg/（g＇h）, being 61.55% higher than that ~8.319 mg/（g＇h）~ of the control. In this condition, the water use efficiency of tomato was 16.97% higher than the control.
出处
《干旱地区农业研究》
CSCD
北大核心
2011年第6期18-24,共7页
Agricultural Research in the Arid Areas
基金
"十二五"863计划课题(2011AA100507)
农业转化资金项目(2010GB2G000470)
关键词
根际通气
盆栽番茄
植株生长
根系生长
水分利用率
rhizosphere aeration
potted tomato
plant growth
root growth
water use efficiency
