干旱地区农业研究2013，Vol.31Issue(3)：19-25,60,8.
陇东旱地果园地表覆盖方式对苹果光合特性的影响
Effects of different mulch modes on apple photosynthesis in dry-land orchards of east Gansu Province
摘要
Abstract
In order to select the proper soil tillage model for apple orchard in dry highland of Longdong,different surface mulch modes were tested on twenty-years old ‘ Fuji' apple.The photosynthetic characters of apple trees in different modes were analyzed,and economic efficiency was compared also.The results showed that diurnal changes of photosynthetic rate (Pn) presented double-peak curve in clean tillage treatment(F4).The diumal changes of photosynthetic rate (Pn) in film mulch,straw mulch,and gravel mulch showed one-peak curve.The highest net photosynthetic rate gained in grass cover mode,peaked at 10:00 am.Water use efficiency (WUE) was significantly increased(P ＜ 0.01)as well.Photosynthetic rate (Pn) was significantly positively correlated with atmospheric relative humidity (RH),and was significantly negatively correlated with air temperature (Ta) and leaf temperature (Tl).There was significant positive correlation between transpiration rate (Tr) and air temperature (Ta) and leaf temperature (Tl).After covered with straw,LCP was significantly decreased but LSP was increased.Pnmax in straw cover mode was greater than in CK.CCP in straw cover mode was significantly lower than in F1 、F3 and F4.The economic analysis showed that film mulch mode had high income to cost ratio.In conclusion,in dry land orchard,straw cover and film mulch significantly increased photosynthesis and the yield of ‘ Fuji' apple,enhanced the dry matter formation,and improved light and C02 utilization capacity of apple trees.关键词
覆盖方式/富士苹果/光合特性/经济效益Key words
cover mode / ‘ Fuji' apple / photosynthesis / economic benefit分类
农业科技引用本文复制引用
孙文泰,赵明新,尹晓宁,董铁,刘兴禄,牛军强,马明..陇东旱地果园地表覆盖方式对苹果光合特性的影响[J].干旱地区农业研究,2013,31(3):19-25,60,8.基金项目
国家苹果产业技术体系专项资金(CARS-28) （CARS-28）
甘肃省苹果产业科技攻关项目(2010-429) （2010-429）
甘肃省农业综合开发科技推广项目(2008-1) （2008-1）
国家科技支撑课题(2007BAD52B03) （2007BAD52B03）
