摘要
应用黑龙江省南部1983—2009年15个农业气象观测站玉米生长季的土壤湿度资料,采用气候倾向率统计方法,利用GIS空间分析模块,分析了黑龙江省玉米生长季不同生育期土壤相对湿度的时空变化特征及与产量的关系。结果表明:近27年来黑龙江省南部玉米生长季不同生育期土壤相对湿度均呈下降趋势,与降水量呈极显著正相关;土壤相对湿度的空间分布存在明显差异,黑龙江省玉米产区松嫩平原中东大部及三江平原土壤相对湿度正常或偏高,松嫩平原西部土壤相对湿度偏低。土壤相对湿度年变化倾向率空间分布特征为松嫩平原中东大部、牡丹江大部呈下降趋势,仅少数地区呈增加趋势。松嫩平原西部偏旱地区的青冈、泰来玉米实际单产与生长季各生育期的土壤相对湿度均呈显著的正相关,土壤偏干或偏湿对玉米的产量形成均存在不利的影响。
Based on the observation data of soil moisture during corn growing season （from May to September） in 1983--2009 from 15 agro-meteorological stations in South Heilongjiang Province, with the statistical method of the cli- matic tendency rate and trend coefficient, using of GIS spatial analysis module, the characteristics of spatial and temporal variations of soil moisture and relationship between them at different growth stages of corn growing season in South Hei- longjiang Province were analyzed. The results showed that： Soil moisture during different growth stages of corn in 1983-- 2009 had a decreasing trend and was significantly positively correlated to precipitation; The spatial distribution of soil moisture was obviously different in various areas, the soil moisture was normal or relatively higher in Sanjiang Plain and the middle agricultural area, while it was relatively lower in western Songnen Plain. The spatial distribution of annual change trend rate of soil moisture showed that： Most of the Middle East Songnen Plain and most of Mudanjiang area had a decreasing trend, only a few areas showed an increasing trend. In the dry areas of Qinggang and Tailai in western Song- nen Plain, corn yield and the actual growth period of each growing season and soil moisture showed a significantly positive correlation, and partial dry or wet soil had a adverse influence on corn yield.
出处
《干旱地区农业研究》
CSCD
北大核心
2012年第4期20-25,共6页
Agricultural Research in the Arid Areas
基金
公益性行业(气象)科研专项资助项目(GYHY201106026)
关键词
黑龙江省
玉米生长季
土壤湿度
时空分布
产量
Heilongjiang Province
corn growing season
soil moisture
spatial and temporal distribution
yield
作者简介
作者简介：吕佳佳（1983-），女，黑龙江哈尔滨市人，硕士，工程师，研究方向为应用气象。E-main：freelvjia@163．com。
通讯作者：姜丽霞（1972-），女，吉林德惠市人，硕士，高级工程师，研究方向为应用气象和气候资源研究。E-mail：nongyeqixiang@yahoo．com．cn.
