Afforestation technique study based on water consumption features of Zanthoxylum bungeanum in Guizhou karst area

Water consumption features are studied in the experimental area, and then planting hole of certain size is made in karst area. The results show that the water consumption of Zanthoxylurn bungeanum vat. dintanensis in leafing phase（March to April）and fruiting period（May to June）as well as autumn time（July to August） are respectively 17.66 mm, 109.1 mm and 44.03 mm. Total water consumption in growing period is 170. 70 mm. The maximum daily total water consumption at different microhabitats（soil surface, stone gully, stone pit） are 0. 011 291 m^3/m^3, 0. 014 019 m^3/m^3and 0. 013 175 m^3/m^3 respectively, and the minimum daily total water consumption of different microhabitats （soil surface, stone gully, stone pit） are 0. 007 337 m^3/m^3, 0. 009 124 m^3/m^3 and 0. 008 571 m^3/m^3 respectively. Size of planting hole at different habitats is different due to the difference of microhabitats, soil moisture and microclimate, and the maximum size of planting hole should be in stone pit and the minimum size on soil surface.