摘要
刈草覆盖是坡地果园土壤夏季抗旱降温和冬季保温防冻的主要管理措施。为了解覆盖对土壤温度的影响及其变化规律，我们通过连续两年采用刈草覆盖与裸土作对照的定点定时观测记载，得出了不同土壤管理方式的地面最高、最低温度和０ｃｍ、５ｃｍ、１０ｃｍ、１５ｃｍ及２０ｃｍ土层温度的变化规律：（１）覆盖条件下，土表最高温度低于裸土１．１～５．６℃，以夏季最为明显，土表最低温度高于裸土０．１～３．３℃，以冬季最为明显；（２）土壤温度日较差随土层深度的增加而减小，覆盖条件下，土壤温度日较差小于裸土。覆盖时期以每年５月中下旬至次年３月下旬为宜。
Covering soil of hill orchard with grass is the main way to resist drought and lower temperature inSummer,and to keep tempetature and resist freeze in Winter. The temperature of soil covered with grass andnaked soil were record ed at the appointed spot and time to inquire into the variation regulations and effects The results showed that the maximum temperature of the soil surface covered with grass wast 1.1-5.6℃lower than that of naked soil, whereas, the minimum temperature of the soil surface covered with grass was0.1-3. 3℃ high than that of nakes soil,and that the diurnal difference range of soil temperature decreasedwith soil depth increment and the diurnal difference range of soil temperature of soil covered with grass small-er than that of naked soil.The optimum covering period is from the middle ten days period of May to the tendays period of March next year.
出处
《贵州农业科学》
CAS
1996年第2期35-39,共5页
Guizhou Agricultural Sciences
关键词
刈草覆盖
坡地
果园
土壤温度
covering with grass
hill orchard
soil temperature
