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|關鍵字:||水土保持;soil and water conservation;果園更新;地表逕流率;孔隙率;腐植酸;orchard renewal;runoff;porosity;humic acid||出版社:||臺中巿： 國立中興大學農學院||期刊/報告no：:||農林學報, Volume51, Issue4, Page(s) 19-30.||摘要:||
The objective of this study was to evaluate the effect of orchard renewal on slopeland environmental conservation. The results are described as followings:
1. After adding humic acid to soil, the content of organic matters did not significantly increase. During the process of orchard renewal, organic matters decreased because surface soil was disturbed, cover crops and mulching were removed from the surface and pumpkin was intercropped in orchard. While the content of organic matters rapidly raised after adding base fertilizer to soil.
2. Although organic acid could not effectively increase soil porosity, it would slow down the decrease of soil porosity for three months. The lowest soil porosity measured from test area was almost about 31%. After orchard renewal, the soil porosity would be reached to 44% with the improvement of the physical and chemical property of soil.
3. After adding hunic acid, the decrease of surface runoff was about 50%. It shows that organic mattcrs could enhance the soil aggregation, improve the soil infiltration and decrease the runoff from the surface of land.
|Appears in Collections:||第51卷 第04期|
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