熱帶地區生產夏季蔬菜之坡地水土保持方法研究

Abstract

本試驗設置於鳳山熱帶園藝試驗分所坡度11°(20%)東南向砂質壤土的坡地上。其目的在比較各種水土保持方法在坡地夏季蔬菜園對水土流失之控制效果，以及對土壤水分，土壤理化性和蔬菜生育之影響情形，以探究熱帶地區生產夏季蔬菜最佳的水土保持方法，進而確立熱帶地區坡地夏季蔬菜園合理的土壤管理方法，以供推廣之依據。本試驗包括一、內斜式平台增段；二、百喜草帶狀覆蓋及敷蓋；三、戀風草敷蓋；四、無處理清耕對照區等四處理。 Field experiment was conducted on 20% slopeland with sandy loam soil facing southeastern direction at the Fengshan Tropical Horticultural Experiment Station located at 22°33' North latitude. The purposes of this experiment were to compare the effects of various methods of soil conservation on the run-off of water and soil, soil moisture content, physical and chemical properties of soil as well as the growth of vegetables on slopelands for summer vegetable production. In order to ascertain and set up the most reasonable and applicable method of soil management on 20% slopelands for summer vegetable production, four treatments including (A) reverse slope terrace, (B) strip covering and mulching with bahia grass, (C) mulching with weeping love grass, and (D) clean cultivation were designed in this experiment,