草业学报2019，Vol.28Issue(2)：12-22,11.DOI:10.11686/cyxb2018162
覆盖对枸杞根系土壤环境和水分利用的影响
Effects of mulching on soil environment and water utilization by roots of Lycium barbarum
摘要
Abstract
Lycium barbarum (Wolfberry), is the main commercial crop in arid land in northwestern China.This research aimed to improve knowledge of the water uptake characteristics of L.barbarum, in order to increase the water use efficiency of the root system.A mulching experiment was conducted at the Gulang agricultural demonstration area, Gansu province (37.30°N, 103.29°E).The experiment included four mulching treatments:plastic mulching (PM), fabric mulching (FM), stalk mulching (SM), and an un-mulched control (CK).Hydraulic conductivity of the canopy and root, and soil micro-environment were monitored in four year old seedlings of the'Ningqi 1'variety of L.barbarum.It was found that the hydraulic conductivity of the canopy and roots was increased by mulching.The greatest increase occurred with PM, which had values 109.7％and 102.8％ of CK.The root system absorbed water mainly in the 30-100 cm soil depth in the CK plants.Soil moisture increase in 0-30 cm was found to decrease the utilization rate by plants of deeper soil moisture.Depletion of the deep soil moisture was 81.81％in CK, compared to 47.06％in the PM treatment.WUE was lowest in the PM treatment and highest in the SM treatment.By contrast, the soil moisture content at 0-150 cm was increased by mulching, and was highest in the PM treatment.For soil average temperature, the treatments ranked PM＞FM＞CK＞SM.soil organic carbon, microbial biomass, and microbioal diversity index were enhanced in SM (14.69mg·g-1, 618.8×106 CFU·g-1 and 3.13 H, respectively), compared to other treatments, while the soil organic carbon of the PM treatment was the lowest (97.98％ of CK).The soil temperature, soil moisture content with the hydraulic conductivity and water use efficiency showed significant correlations.It suggested that the root water use efficiency in L.barbarumis affected by the mulching material used.Promotion of plant growth and improvement of the soil environment was more pronounced in the SM treatment with other mulching materials, It is possible to increase the water use efficiency of roots by stalk mulching.关键词
枸杞/覆盖/根际土壤/根系/导水率Key words
Lycium barbarum/mulching/rhizosphere soil/root system/hydraulic conductivity引用本文复制引用
胥生荣,张恩和,马瑞丽,王琦,刘青林,黄钰芳..覆盖对枸杞根系土壤环境和水分利用的影响[J].草业学报,2019,28(2):12-22,11.基金项目
国家自然科学基金项目(31560380) （31560380）
青海省青藏高原特色生物资源研究重点实验室开放课题(2017-ZJ-Y10)资助 （2017-ZJ-Y10）
