地面覆盖对花椒园热量平衡的影响

对花椒林地进行覆膜、覆秸秆和种植三叶草3种方式覆盖,测定不同覆盖条件下冠层的辐射能环境、热量平衡及水分环境.结果表明,地面覆膜、覆秸秆和种植三叶草条件下,地面反射率提高,增加了冠层净辐射,树冠下层接受的反射辐射分别较对照提高69.1%、48.0%和35.7%;树冠中部净辐射能分别较对照提高53.3%、26.3%和0.8%.在热量平衡中,覆膜、覆秸秆和种植三叶草的花椒林潜热通量分别占净辐射能的60.2%、62.4%和65.8%,感热通量分别占净辐射能的36.5%、34.0%和30.6%,土壤热通量分别占3.3%、3.6%和4.2%.

Effect of Different Ground Coverings on the Heat Capacity Balance in Zanthoxylum bungeanum Land

The change laws of radiation energy environment, heat capacity balance and water environment were studied in the condition of covering membrane, straw pole and Trifoliu repens on the ground of Zanthoxylum bungeanum land. The results showed that the reflecting rate of ground and net radiation increased. The reflecting radiation below tree crown from ground increased by 69. 1%, 48. 1% and 35. 7% by covering membrane, straw pole and T. repens than that of control test, net radiation of tree crown in the middle increased by 53. 3% , 26. 3% and 0. 8% than that of control test respectively, in the heat capacity balance, the percent of latent heat flux were 60. 2%, 62. 4% and 65. 8% , respectively.