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红黄壤丘区旱耕地种植苎麻，较种植其它作物（油菜－红薯；马铃薯一红薯；油菜－棉花等）可增加产值３５．３－２４１．２％，增加生物产量１８０％左右，每年每亩有５０００ｋｇ左右鲜物还地利用。在３０°坡度下，水土流失量分别约减轻４４．９６％和４８．７％。４年以上麻龄麻国土壤有机质和全氮平均分别增加４９．４％和１８．１％，有明显提高土壤肥力作用．且土壤水热状况、土壤三相比和土壤剖面特征等均有改善，土壤微生物数量增加。老麻地改种其它作用均可增产。据此，本研究为南方红黄壤培肥改良和高效利用提出了一条新途径和理论依据。
Red ramie hilly mulberry fields planted ramie, planting more crops than other crops (rape - sweet potato; potato - sweet potato; rape - cotton, etc.) can increase the output value of 35.3-241.2%, an increase of about 180% of the biological yield per acre per year 5000kg around the use of fresh materials. At the 30 ° slope, the amount of soil erosion decreased by about 44.96% and 48.7% respectively. The soil organic matter and total nitrogen of four years of age were higher than the average age by 49.4% and 18.1%, respectively, significantly improving soil fertility. Soil water and heat conditions, soil three-phase ratio and soil profile characteristics were improved, and the number of soil microorganisms increased. The old Maadi replanting other effects can increase production. Accordingly, this study proposed a new approach and theoretical basis for the improvement and efficient use of fertilizers in southern red-yellow soil.