笋用红竹林施肥效应研究

2001-2006年,采用随机区组排列,对红竹笋用试验林设置施用有机肥、化肥、有机肥和化肥混施及对照(不施肥)4个处理。结合精确施肥和试验区内长期定位观测,研究了不同施肥处理对笋用红竹林笋产量、土壤物理性质等的影响。在此基础上,根据整个竹林的投入、产出计算了竹林的经济效益;用环境能耗评价法研究了竹林小区水文生态效益。结果表明:施肥初期,不同处理对红竹笋产量影响不明显,处理2 a后施肥效应开始显现,表现为有机无机混施>单施无机肥>单施有机肥>对照(不施肥)。不同模式下的经济效益评价结果表明,通过荒山改人工经营红竹林,5 a就可以收回成本。与种植红竹试验林之前的荒山土壤相比,施肥明显改善了土壤物理性质,表现为容重降低,毛管孔隙度增大,使土壤涵养水源的作用明显增强,不同施肥模式下蓄水量从大到小为:混施>有机>无机>对照。生态效益的评价也表明,相比荒山而言,四种施肥模式涵养水源的生态效益分别可达:855.60、662.40、1 035.00和565.8元.hm-2。

Economic and Ecological Effect of Fertilization on Shoot-use Phyllostachys iridescens Forest

Experiment on effect of four fertilization treatments such as organic fertilizer(A),chemical one(B),mixed one(A B)and ck(control) on shoot yield and soil physical property in a shoot-use Phyllostachys iridescens field from 2001 to 2006 by randomized blocks.Economic and ecological effect of the experiment was evaluated based on input and output and by environmental consumption assessment(ECA).The result indicated that fertilization had no distinctive effect on shoot yield at the first years.Treatments had difference with A B>B>A>CK two years latter.Economic effect evaluation indicated that cost of artificial Ph.iridenscens forest in barren hill could be earned in 5 years.Compared with the barren soil before the experiment,fertilization improved soil physical property,for examples,lower bulk density,more capillary porosity and water conservation capacity which was A B>A>B>ck.Ecological effect evaluation resulted 855.60,662.40,1035.00 and 565.8RMB/ha respectively compared with the barren soil before the experiment.