干旱地区农业研究Issue(2)：266-271,6.DOI:10.16302/j.cnki.1000-7601.2015.02.043
西藏气候变化及其对作物产量潜力的影响
Effect of climate change on yield potential of crops in Tibet
格桑曲珍 1普布次仁 2胡希远1
作者信息
- 1. 西北农林科技大学农学院，陕西 杨凌 712100
- 2. 西藏自治区林业科学院，西藏 拉萨 850000
- 折叠
摘要
Abstract
Based on observation data of six representative meteorological stations in Tibet during 1971 — 2010 ,and using linear trend estimation ,this study analyzed characteristics of climate change in the past 40 years in Tibet .We stud-ied the changing trends of light-temperature productivity (LTPP) and climatic potential productivity (CPP) of barley and wheat in the past 40 years from six major agriculture areas in combination with the data of actual productivity .The results showed that :(1) In the past 40 years ,the temperature and precipitation increased ,the mean temperature increased by 2 .26 ℃ in the six major agriculture areas ,the increasing rate of mean temperature was higher than that of China (1 .1 ℃・100a - 1 ) ;(2) The LTPP of barley and wheat increased at an annual rate of 53 kg・hm - 2 and 107 kg・hm - 2 with the in-creased temperature ,respectively .The CPP increased at an annual rate of 94 kg・hm - 2 and 110 kg・hm - 2 with a slight increasing of precipitation ,respectively ;(3) The changing trend of yield potential in terms of LTPP and CPP of barley and wheat decreased .For barley ,there existed gap between the actual yield LTPP (10 385 kg・hm - 2 ) and CPP (5 969 kg・hm - 2 ) of barley ,while those for wheat were 9 040 kg・hm - 2 and 5 197 kg・hm - 2 ,respectively .关键词
气候变化/西藏/生产潜力/青稞/小麦Key words
climate change/Tibet/yield potential/barley/wheat分类
农业科技引用本文复制引用
格桑曲珍,普布次仁,胡希远..西藏气候变化及其对作物产量潜力的影响[J].干旱地区农业研究,2015,(2):266-271,6.
