摘要
初步研究了香根草[Vetiveriazizanioides(Linn.)Nash]绿篱在新植橡胶园中的水土保持作用。在23°的坡地新植橡胶园的环山行外坡种植1～2行香根草丛(每丛3株),丛距20 cm。植草18个月后,香根草绿篱基本形成;种草18～30个月后,2行香根草绿篱处理区的临界径流降雨量比对照区(传统环山行)高1.2 mm,径流量和土壤侵蚀量分别比对照区降低27.2% 和26.7%;植草6～30个月后,2行香根草绿篱处理区的环山行外坡泥土淤积高度达2.4 cm,而对照区环山行外坡泥土侵蚀高度达1.8 cm;在此期间,未观察到香根草绿篱对橡胶树生长的不利影响。这表明,环山行外坡种植的香根草绿篱有一定的水土保持作用,但香根草在胶园的生态适应性和应用价值有待更深入的研究。
An experiment was conducted to investigate the effect of vetiver [Vetiveria zizanioides (Linn.) Nash] hedges on water and soil conservation in a one-year-old rubber plantation. One to two rows of vetiver were planted at a space of 20 cm along the outer slope of contoured terrace of the newly established rubber plantation. The vetiver hedges were basically established after 18 months of planting. At 18～30 months after planting, the critical rainfall causing runoff under treatment II was 1.2 mm higher than that under the control with the conventional contoured terrace. The runoff and soil erosion of treatment II were 27.2% and 26.7% less than those of the control. At 6～30 months after planting, soil loss was accumulated 2.4 cm high along the upside of vetiver hedges under treatment II, and the soil was eroded 1.8 mm high along the outer slope under the control. There was no disadvantageous effect of vetiver hedges on the growth of rubber trees. The results suggested that vetiver hedges were beneficial in water and soil conservation once they were basically established. But the value and ecological adaptability of vetiver hedges in rubber plantations needs further research.
出处
《热带农业科学》
2004年第5期5-9,共5页
Chinese Journal of Tropical Agriculture
基金
联合国计划署资助课题(CPR/96/105)。
关键词
香根草
绿篱
新植
水土保持作用
初报
橡胶园
种植
对照
处理
观察
rubber plantation
vetiver
Vetiveria zizanioides (Linn.) Nash
water and soil conservation
agri-ecology
