草业学报Issue(4)：208-213,6.DOI:10.11686/cyxb20150424
温带果园护土生草鼠茅草的腐解和养分释放
Decay and nutrient release in Vulpia myuros grasses,a species suitable for soil con-servation in temperate zone orchards
摘要
Abstract
The grass species Vulpia myuros has a September-to-June growth period and can enhance orchard soils and prevent water loss and soil erosion.However,orchard managers are often concerned by the species’ presence as a competitor for nutrients with fruit trees.This paper reports an investigation of the decomposition and nutrient release rates of V .myuros in the Qingdao area of northern China,which has a humid climate. Dead V .myuros was collected in late June 2012 and buried at the depth of 10 cm in soils with three moisture content levels (65%,75% and 85%).Decay rates and the release rates of carbon,nitrogen,phosphorus and potassium were measured every ten days between July and October.Results showed thatV .myuros has a very fast decay rate,with approximately 30% decomposed within 80 days.This decay releases carbon,nitrogen, phosphorous and potassium,principally during the first 20 -40 days.Potassium had the fastest release rate, followed by phosphorous,while nitrogen and carbon were the slowest.Soil moisture had a significant effect on decomposition.The decay rate is accelerated when moisture levels are raised from 65% to 85%.The study concludes that V .myuros can supply nutrients to fruit trees and does not compete with them,as previously thought.Thus V .myuros can be used in the temperate hilly regions in northern China in order to enhance nu-trient cycling in orchard ecosystems.关键词
鼠茅草/腐解/养分释放/果园/树草互利/水土保持Key words
Vulpia myuros/stalk decaying/nutrient releasing/orchard/mutualism of fruit trees and grasses/soil and water conservation引用本文复制引用
杨洪晓,周美华,李俊良,梁斌,隋方功..温带果园护土生草鼠茅草的腐解和养分释放[J].草业学报,2015,(4):208-213,6.基金项目
公益性行业（农业）科研专项项目（201103005）和国家自然科学基金项目（31270382）资助。 （）
