Ecological and Economic Benefits of Vegetation Management Measures in Citrus Orchards on Red Soils

SHUI Jian-Guo; WANG Qiu-Zhen; LIAO Gen-Qing; J.AU; J.L.ALLARD

摘要

A three-year experiment was conducted to investigate and compare the economic and ecological benefits of six types of vegetation management measures in citrus orchards of the hilly red soil region of the eastern part of China.Six vegetation treatments,including tillage without herbicide (clean tillage) and no tillage without herbicide (sod culture)and with herbicide paraquat (paraquat),glyphosate (glyphosate),glyphosate-glyphosate-paraquat (G-G-P),and paraquatparaquat-glyphosate (P-P-G),were applied in the citrus orchards on a clayey red soil with slopes of 8° and 13° and a sandy soil with slope of 25°.The results showed that the sod culture,paraquat,glyphosate,G-G-P,and P-P-G treatments reduced surface runoff by 38.8%,42.5%,18.7%,28.7%,and 37.5%,then the soil-water losses by 55.5%,51.7%,39.9%,46.8%,and 50.0%,and the N,P,and K nutrient losses by 60.3%,50.2%,37.0%,41.8%,and 45.4%,respectively,as compared with the clean tillage treatment.The weed regeneration ratios with the treatments of clean tillage without herbicide,paraquat,glyphosate,G-G-P,and P-P-G were reduced by 55.1%,67.2%,30.3%,36.8%,and 51.2%,respectively,as compared withthe sod culture.The sod culture,paraquat,glyphosate,G-G-P,and P-P-G treatments could increase the soil fertility (annual accumulation of N,P,K,and OM) by 7.1%,6.9%,5.3%,6.2%,and 6.6%,respectively,whereas the clean tillage treatment without herbicide reduced soil fertility by 4.4% after the three-year experiment.The citrus fruit yields in the treatments of paraquat,glyphosate,G-G-P,and P-P-G increased by 7%-10%;the soluble solid,total sugar,total acidity,sugar-acid ratio,and single fruit weight of citrus fruits of all treatments except sod culture significantly (P > 0.05)exceeded that of the clean tillage treatment.In general,the paraquat treatment showed the best economic and ecological benefits among the six treatments;therefore,it could be regarded as the best available vegetation management measure in citrus orchards of hilly red soil region to retain water and soil,enhance soil fertility,and improve the yield and quality of citrus.

机译：进行了为期三年的试验，以调查和比较中国东部丘陵红壤区柑桔园的六种植被管理措施的经济和生态效益。六种植被处理方法包括无除草剂耕作（清洁耕作））且没有除草剂（草皮培养）和除草剂百草枯（百草枯），草甘膦（草甘膦），草甘膦-草甘膦-百草枯（GGP）和百草枯百草枯-草甘膦（PPG）进行的耕作均用于红壤柑桔园结果表明，草皮，百草枯，草甘膦，GGP和PPG处理可降低地表径流38.8％，42.5％，18.7％，28.7。％，37.5％，则水土流失分别为55.5％，51.7％，39.9％，46.8％和50.0％，N，P，K养分损失分别为60.3％，50.2％，37.0％，41.8 ％，与清洁耕作相比分别为45.4％。在不使用除草剂，百草枯，草甘膦，GGP和PPG的清洁耕作下，与草皮培养相比分别减少了55.1％，67.2％，30.3％，36.8％和51.2％。，PPG处理分别可使土壤肥力（N，P，K和OM的年度积累）分别提高7.1％，6.9％，5.3％，6.2％和6.6％，而无除草剂的清洁耕作可减少土壤三年试验后的生育率提高了4.4％。百草枯，草甘膦，GGP和PPG处理的柑橘类水果产量提高了7％-10％;可溶性固形物，总糖，总酸度，糖酸比，除草皮栽培外，所有处理的柑橘类水果的单果重均显着高于清洁耕作处理（P> 0.05）。总体而言，百草枯处理在六种处理中表现出最佳的经济和生态效益;因此，被认为是丘陵红壤柑桔园中最佳的植被管理措施保留水分和土壤，提高土壤肥力，提高柑桔的产量和品质。

Ecological and Economic Benefits of Vegetation Management Measures in Citrus Orchards on Red Soils

摘要

著录项

相关主题

期刊订阅