不同生草处理对雪青梨光合特性的影响  

Effect of the Different Grass Species Inter-planting on the Photosynthetic Characteristics of Pear

作　　者：赵明新[1] 孙文泰[1] 张江红[1] 

机构地区：[1]河北农业大学园艺学院河北省梨工程技术研究中心,河北保定071000

出　　处：《安徽农业科学》2010年第33期18689-18690,18692,共3页Journal of Anhui Agricultural Sciences

基　　金：现代农业产业技术体系专项(nycytx-29-11);农业部公益性行业科研专项(nyhyzx07-026)

摘　　要：[目的]研究不同生草制度对雪青梨光合特性的影响,选择适合雪青梨行间种植的草种。[方法]以雪青梨为试材,利用CIRAS-2便携式光合作用测定系统测定了4种生草制度下,雪青梨的净光合速率变化和光合作用日变化。[结果]雪青梨的净光合速率(Pn)日变化呈单峰型,不同生草制度下雪青梨的Pn不同,行间种植三叶草处理的雪青梨叶片的Pn最高,为11.08μmol/(m2.s),其次为黑麦草,为10.48μmol/(m2.s),清耕条件下最低,为9.28μmol/(m2.s);不同生草模式下清耕的气孔阻止值最大(0.349 5),黑麦草的最小(0.234 8);三叶草的水分利用率最大(2.848),清耕的最小(2.048)。[结论]该研究为梨树果园行间生草大面积的推广提供了理论依据。[Objective] The grass species suitable for the pear planting was selected through the research on the effect of different grass-planting systems on the photosynthetic characteristics of pear.[Method] The diurnal variation of net photosynthetic rate and photosynthesis of pear,which was planted in four species of grass growths,was measured with CIRAS-2 portable photosynthesis system.[Result] The diurnal variation of net photosynthetic rate（Pn） of pear showed a single peak.The Pn value of pear in the different grass-planting system was different.The highest Pn value of pear was from the treatment of the alfalfa planted between two lines of pear trees,which was 11.08 μmol/（m^2·s）;then,the ryegrass,10.48 μmol/（m^2·s）;and the lowest value was from the CK,without grass planted between two lines,9.28 μmol/（m^2·s）.The largest prevention value of the pear stomata value was 0.349 5,which was from the CK;and the minimum,0.234 8,from ryegrass.The maximum of water-using efficiency was 2.848,which was from the treatment of alfalfa planting and the minimum,2.048.[Conclusion] The theoretical basis of the grass planted between the pear tree lines in orchard was provided.

关 键 词：生草 梨 光合特性 净光合速率 水分利用率 

分 类 号：S661.2[农业科学—果树学]