Abstract:

The radiation energy environment, energy balance and water environment have been studied by means of the 3 treatments of covering plastic film, straw and planting Trifolium repens on the ground of Zanthoxylum bungeanum plantation in Feng County, Shaanxi. The results showed that the ground reflectivity and the canopy net radiation increased in the conditions of covering plastic film, straw and planting T. repens on the ground, so that the reflections in the middle part increased 53.3%,26.3% and 0.8% than that of the contrast. In the heat balance, the hidden heat flux in the conditions of covering plastic film, straw and planting T. repens accounts for 60.2%,62.4% and 65.8% of the net radiation energy, the reaction heat flux accounts for 30.4%,29.7% and 27.1%, and the soil heat flux accounts for 9.4%,7.9% and 7.1%. The soil water content in 0～50 cm were higher 5.6%,8.7% and 13.9% in covering plastic film, straw and planting T. repens on the ground than in the contrast. The transpiration rate of the leaves of Z. bungeanum were 1.6,1.4,1.1 times in planting T. repens,covering plastic film and straw on the ground as that of the contrast in May.

Key words: Zanthoxylum bungeanum plantation, ground covering, radiation energy, energy balance, water effect