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丘陵是“山—丘—谷”的过渡地带 ,生态系统脆弱 ,一旦植被遭破坏 ,极易水土流失。在红壤丘陵园地应用除草剂调控水土流失试验结果表明 :与传统的清耕法相比 ,克无踪、草甘膦、草草克、克克草和生草法可使地表径流量分别减少47.7%,2 0 .8%,31.4%,41.3%和 45 .5 %;可使土壤侵蚀量分别减少 5 2 .4%,39.0 %,48.1%,5 0 .7%和 5 5 .2 %;可使土壤养分分别减少 5 0 .2 %,37.0 %,41.8%,45 .8%和 6 0 .3%。除草剂对杂草再生率影响 ,与生草法比较 ,克无踪可达 6 7.2 %,草甘膦达 30 .3%,草草克 36 .8%,克克草 5 1.2 %和清耕法 5 5 .1%;克无踪调控杂草效果分别是草甘膦的 2 .2倍 ,清耕法的 1.2倍。克无踪调控杂草效果显著 ,有望成为红壤丘陵园地培肥与水保相得益彰的有效措施。
Hilly is a “mountain - mound - valley” transitional zone, fragile ecosystems, once vegetation is destroyed, extremely easy to soil erosion. The result of soil and water loss control applying herbicide in red soil hilly field shows that the surface runoff can be reduced by 47.7%, compared with the traditional tillage method, with no trace of glyphosate, glyphosate, 20.8%, 31.4%, 41.3% and 45.5%, respectively; the soil erosion can be reduced by 5.24%, 39.0%, 48.1%, 50.7% and 55.2% Soil nutrients decreased by 50.2%, 37.0%, 41.8%, 45.8% and 60.3% respectively. The effect of herbicide on weed regeneration rate was no more than 62.2%, 30.3% of glyphosate, 36.8% of grass, 5.2% of kelp and 1.2% 5 5 .1%; g no trace control weed effects are 2.2 times of glyphosate, clearing method 1.2 times. Kweichao trace weed control effect is significant, is expected to become red soil hilly garden fertilizer and water and soil conservation complement each other effective measures.