杨粮间作林内土温及水分因子的变化

The changing rules of soil temperature and water in farmland inter planted poplars

根据江苏省泗阳县境内南方型杨树杨粮间作林内土温及水分因子４ａ定位观测资料，系统地分析了杨粮间作林中土温及水分因子的变化规律。间作地年均温度低于对照，且温度变化缓慢；各原土壤含水量均低于对照，减少了对间作物的水分供应，但林粮间作可降低风速，减少蒸发，提高相对湿度。

According to the soil temperature and water date of farmland from forest of the southern type poplars located in Siyang county,Jiangsu province,the changing rules of soil temperature and water have been analysed systematically.Average soil temperture of farmland inter planted poplars is lower than the one of CK,but the range of soil temperature in one year is less.The poplars reduce water supply to farmland,but evaporation is decreased and relative humidity is increased by inter planting. Author’s address Nanjing Forestry University,210037 PRC