贵州省喀斯特区基于林木耗水特征的顶坛花椒造林整地技术

通过对试验区顶坛花椒的耗水特征进行研究,确定喀斯特区造林植苗穴规格。研究结果表明:喀斯特区顶坛花椒展叶期（3-4月）的耗水量为17.66mm、开花结果期（5-6月）为109.01mm、成熟期（7-8月）为44.03mm,其生长发育期总耗水量为170.70mm。土面、石槽、石沟三种小生境的最大日总需水量分别为0.011291m^3/m^3、0.014019m^3/m^3、0.013175m^3/m^3;而最小日总需水量为0.007337m^3/m^3、0.009124m^3/m^3、0.008571m^3/m^3。喀斯特区不同小生境植苗穴大小因小生境、土壤含水量、小气候环境不同而存在差异。其植苗穴大小为石槽最大,其次是石沟,最小是土面。 

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 Zanthoxylum bungeanum var. 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 m3/m3, 0.014 019 m3/m3 and 0.013 175 m3/m3 respectively, and the minimum daily total water consumption of different microhabitats(soil surface,stone gully, stone pit) are 0.007 337 m3/m3, 0.009 124 m3/m3 and 0.008 571 m3/m3 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.