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土壤温度和水分状况是中国土壤系统分类的两个重要诊断特性。土壤的水热状况受近地表温度和降水的直接影响,可以通过气候因素来估算土壤水分和温度状况。以陕西省85个气象台站连续30年的地面气象数据为基础,采用地统计与纽荷模型(JNSM)相结合的方法研究了陕西省土壤温度和水分状况及其空间分布。结果表明,土壤温度状况表现为:秦岭山区及其以北为温性,汉江河谷地区及其以南为热性;土壤水分状况表现为:长城以北为干旱,陕北黄土高原地区和关中盆地为半干润,秦岭以南为湿润,常湿润仅在最南端镇巴县和镇坪县的小部分南部地区存在。
Soil temperature and water status are two important diagnostic features of soil taxonomy in China. Soil water and heat conditions are directly affected by near-surface temperature and precipitation, and soil moisture and temperature conditions can be estimated by climatic factors. Based on the meteorological data of 85 meteorological stations in Shaanxi Province for 30 consecutive years, this paper studied the soil temperature and water status and its spatial distribution in Shaanxi Province by using the method of geostatistics and New Holland Model (JNSM). The results show that the soil temperature is as follows: the Qinling Mountains and its north are warm, the Hanjiang River valley and its south are hot; the soil moisture is as follows: the north of the Great Wall is arid, the Loess Plateau of Shaanxi and the Guanzhong Basin For the semi-dry run, the south of the Qinling is humid, often wet only in the southern tip of Zhenba County and a small part of southern town exist.