干旱区生态环境知识资源中心(Arid): 黄土高原半干旱区气候变暖对胡麻生育和水分利用效率的影响

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	黄土高原半干旱区气候变暖对胡麻生育和水分利用效率的影响
其他题名	Effects of climate warming on oil flax growth and water use efficiency in semi-arid region of Loess Plateau,Northwest China．
	姚玉璧 1; 王润元 1; 杨金虎 2; 肖国举 3; 张秀云 2; 岳平 1
来源期刊	应用生态学报
ISSN	1001-9332
出版年	2011
卷号	22 期号:10 页码:2635-2642
中文摘要	利用黄土高原半干旱区胡麻生长发育定位观测资料和同期气象观测资料,分析气候变化对胡麻生长发育的影响,以及胡麻水分利用效率与气象条件的关系．结果表明:研究区年降水量呈下降趋势,其气候倾向率为-15.80 mm·(10 a)~(-1),年降水量存在3 a、6 a的周期变化;年均气温呈上升趋势,其气候倾向率为0.36℃·(10 a)~(-1);作物生长季干燥指数呈显著上升趋势,其气候倾向率为0.12·(10 a)~(-1),20世纪90年代初至2009年明显趋于干旱化．研究区胡麻全生育期天数为120～150 d,≥0℃积温为1700～2100℃·d,降水量为200～ 250 mm,日照时数为1000～1300 h．影响黄土高原半干旱雨养农业区胡麻生长发育的主导气象因子是气温和降水量．气温增高导致胡麻生育前期的营养生长阶段缩短;而气温增高、降水量减少,则导致生殖生长阶段延长,从而使全生育期延长．除出苗期和成熟期外,气温对其余时期的胡麻产量形成均表现为负效应,现蕾期对气温变化十分敏感;除开花期外,其余时段降水量对胡麻产量形成均为正效应,胡麻出苗期对降水量变化十分敏感．胡麻水分利用率与胡麻出苗期气温、日照时数和现蕾-成熟期干燥度呈显著正相关,与胡麻现蕾-成熟期降水量呈显著负相关．研究区57月干燥度是影响胡麻水分利用率的关键因子。
英文摘要	By using the site-specific observation data of oil flax growth and related meteorological records in semi-arid region of Loess Plateau,this paper studied the effects of climate change on the oil flax growth,and analyzed the relationships between the oil flax water use efficiency and meteorological condition．In this region,the annual precipitation displayed a decreasing trend,and its climatic trend rate was-15．80 mm·(10 a)~(-1),with an annual periodic change of 3 a and 6 a,whereas the annual air temperature had an increasing trend,and its climatic trend rate was 0.36℃·(10 a)~(-1)．In crop growth period,the aridity index displayed a marked increasing trend,its climatic trend rate was 0．12·(10 a)~(-1),and the aridity tendency was more obvious from the beginning of 1990s to the year 2009．From sowing to maturation,oil flax needed 120-150 d,1700-2100℃·d of ≥0℃accumulated temperature,200-250 mm precipitation,and 1000-1300 h sunshine hours．The main meteorological factors affecting the oil flax growth in the region were air temperature and precipitation．The increase of air temperature shortened the prophase vegetative growth stage,whereas the increase of air temperature and the decrease of precipitation extended the reproductive growth stage,causing the extension of the whole growth period of the oil flax．The air temperature in the oil flax whole growth period except at seeding stage and maturing stage had negative effect on the yield formation,being more obvious at squaring stage,whereas the precipitation in the whole growth period except at blooming stage had positive effect on the yield formation,being more obvious at seeding stage．The water use efficiency of the oil flax was significantly positively correlated with the air temperature and sunshine hours at seeding stage as well as the aridity index from squaring stage to maturing stage,and negatively correlated with the precipitation from squaring stage to maturing stage．In the study region,the aridity index from May to July was the key factor affecting the water use efficiency of oil flax．
中文关键词	黄土高原 ; 气候变暖 ; 胡麻 ; 生育 ; 水分利用效率
英文关键词	Loess Plateau climate warming oil flax growth water use efficiency.
语种	中文
国家	中国
收录类别	CSCD
WOS类目	METEOROLOGY ATMOSPHERIC SCIENCES ; AGRICULTURE MULTIDISCIPLINARY
WOS研究方向	Meteorology & Atmospheric Sciences ; Agriculture
CSCD记录号	CSCD:4330643
来源机构	宁夏大学 ; 中国气象局兰州干旱气象研究所
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/227350
作者单位	1.中国气象局兰州干旱气象研究所, 甘肃省干旱气候变化与减灾重点实验室;;中国气象局干旱气候变化与减灾重点开放实验室, 兰州, 甘肃 730020, 中国; 2.定西市气象局, 定西, 甘肃 743000, 中国; 3.宁夏大学新技术应用研究开发中心, 银川, 宁夏 750021, 中国
推荐引用方式 GB/T 7714	姚玉璧,王润元,杨金虎,等. 黄土高原半干旱区气候变暖对胡麻生育和水分利用效率的影响[J]. 宁夏大学, 中国气象局兰州干旱气象研究所,2011,22(10):2635-2642.
APA	姚玉璧,王润元,杨金虎,肖国举,张秀云,&岳平.(2011).黄土高原半干旱区气候变暖对胡麻生育和水分利用效率的影响.应用生态学报,22(10),2635-2642.
MLA	姚玉璧,et al."黄土高原半干旱区气候变暖对胡麻生育和水分利用效率的影响".应用生态学报 22.10(2011):2635-2642.