摘要
为了进一步研究西峰土壤湿度对冬小麦气候产量的影响关系，以便合理安排田间管理，增加冬小麦产量，提高质量，利用西峰1981-2008年28年0～100cm逐层土壤湿度资料、西峰农试站试验田冬小麦产量资料，分析土壤含水量与冬小麦气候产量的关系，并计算贡献率，建立回归方程。结果表明：西峰冬小麦气候产量与土壤含水量的年际变化基本一致；3-5月中旬，冬小麦对水分的需求逐渐从浅层向深层发展；5月中旬一7月上旬，深层含水量是冬小麦所需的主要水分来源；8月中旬-9月上旬，土壤蓄水；9月中旬-10月上旬，浅层水分的贡献率最大。土壤含水量对冬小麦气候产量相关性上，蓄墒期中上层（0．40cm）最为明显，生育前期各层都显著相关，中上层（0～50cm）尤为显著；生育中期各层相关性显著，生育后期上层0～20cm为负相关，50～90cm层为正相关；影响率上，蓄墒期明显的是30～60cm及80～100cm层，前期是10～40cm及70cm、90～100cm层，中期是30～40cm层及80～100cm层，后期是60～100cm层，年平均为20～40cm、60～100cm层。
In order to further study the relationship between Xifeng soil moisture and the climate yield of winter wheat, so that people can arrangement field management possibly, increasing winter wheat yield, improving quality, using 28 years 0-100 cm soil moisture data and winter wheat yield data from 1981 to 2008 in Xifeng agricultural station laboratories, it had been analyzed the relations between soil moisture and climate yield of winter wheat, and was calculated the contribution rate, the regression equation was established. The results showed that： the inter-annual variability of winter wheat＇ s climate yield and soil water content was consistent in Xifeng; winter wheat＇ s demand for water was development gradually from shallow to deep in March to mid-may; deep water content was the main water source of winter wheat required in mid-may to early July; the soil was storing water in the middle of August to early September; the contribution rate of shallow water was the largest in mid-September to early October, the correlation of winter wheat＇ s soil moisture and climate yield, upper quantity storage period （0-40 cm） was the most obvious, each layer were significantly correlated at the early stage of the family, upper-middle-class especially （0-50 cm）; in the middle of the bearing, each layer were significantly correlated; on the stage, the upper 0-20 cm was negative correlation,50-90 cm layer was positive correlation; in impact rate, storage period was obvious 30-60 cm and 80-100 cm, early was 10-40 cm, 90-100 cm and 70 cm layer, the middle was 30-40 cm layer and 80-100 cm, 60-100 cm layer was late, and the average of 20-40 cm, 60-100 cm layer.
出处
《中国农学通报》
CSCD
2014年第6期186-192,共7页
Chinese Agricultural Science Bulletin
关键词
土壤湿度
冬小麦
气候产量
贡献率
回归方程
相关系数
soil moisture
winter wheat
climate yield
contribution rate
the regression equation
thecorrelation coefficient
