不同造林技术对水土保持林3种林型土壤蓄水效益的影响——以鲁中砂石山区为例

摘要

采用野外调查、土壤样品采集和室内测定相结合的方法,探讨了不同整地深度、保水剂剂量、株行距等造林技术对鲁中砂石山区黑松林、板栗林、刺槐林3种水土保持林型土壤蓄水效益的影响,旨在为筛选鲁中砂石山区蓄水效益良好的造林技术提供基础数据.结果表明:造林整地可以显著地提高蓄水效益.整地深度为50 cm的刺槐林最大持水量为2 142 t·hm-2,分别比整地深度40、30 cm的刺槐林蓄水效益提高29、117t· hm-2;保水剂对蓄水效益也有明显提高,造林时,施用30 g保水剂的刺槐林有效持水量为2 184t·hm-2,分别比施用20、10 g保水剂提高30、45t·hm-2;土壤蓄水量与株行距呈显著正相关,与整地深度呈极显著正相关.%By field investigation,soil sample collection and laboratory measurement,we studied the effects of different land preparation depth,water-keep agent and planting spacing on soil water storage benefit of Pinus thunbergii,Castanea mollissima and Robinia pseudoacacia soil and water conservation forest in sandy mountainous of Central Shandong for improving the basic data in selecting afforestation techniques with good water storage in the sand mountainous areas of Central Shandong.The land preparation greatly improved the benefit of water conservation.The most effective afforestation technology of R.pseudoacacia was the depth of 50 cm land preparation,the water storage capacity of which was 2 142 t · hm-2,followed by that of 40 cm and 30 cm,which were 2 113 and 2025 t · hm-2,respectively.The water storage was significantly improved by water-keep agent.Before afforestation,the water storage capacity of R.pseudoacacia was 2 184 t · hm-2 by using 30 g water-keep agent,which was 30 and 45 t · hm-2 higher than that by using 20 and 10 g water-keep agent,respectively.There was a significantly positive correlation between soil water storage and planting spacing,and significantly positive correlation with soil depth.