山西旱地农业高效持续发展模式研究

High efficiency and sustainable development models in Shanxi dryland agriculture regions

  • 摘要: 经4年科技攻关研究,建立起3套旱地农业高效持续发展模式,即种养结合良性循环模式,其土地生产率较单作玉米高49.7%,绵羊当年育肥羔羊的屠宰率、净肉率分别较对照组高3.0%和1.4%,应用增肉剂每只羔羊115d总增重11.3kg,较对照组日增重增加14.1%,改良草地产草量可达1.2~1.44万kg/hm2;甘薯-加工-养殖产业化发展模式,其平常年份产鲜薯7.5万kg/hm2以上,生产的淀粉地膜可降低覆膜成本27.9%,研制了甘薯低糖脯,研制的即食粉丝增值率在10倍左右;与现行的清耕果园相比,旱地生态果园双向控制模式0~60cm土层土壤含水量高3.1%,0~40cm土层土壤有机质含量高1.7g/kg,速效钾每g土高0.091mg,4年后土壤容重降低0.20g/cm3,天敌数量超过3倍,害虫减少95%,果实发病率减少80%以上,平均1级果品产量2.7万kg/hm2,增加纯收入1338元/hm2

     

    Abstract: Dryland agriculture plays an important role in developing Shanxi local economy. Base on resource characteristics of dryland regions, three kinds of sustainable development models in Shanxi dryland agriculture regions are established. (i) the good cycling model of combining farming with raising an imals: its land productivity is increased by 49.7% compared with sole maize production system, a lamb gross weight increased by 11.3kg after 115 days, 14.1% more than that under traditional management. Grass output of slope is 12000~14400kg/hm2.(ii) Model of sweet potato-processing-raising animals: its sweet potato yield is more than 75000kg/hm2,cost of starch film is lower 27.9% than PVC film, two kinds of sweet potato products are produced, the value of producing starch noodle is 10 times sweet potato. (iii) Eco-orchard model with double-way controlling soil water: compared with the clearing orchard, soil water content of 0~60cm depth in eco-orchard is more 3.1%, organic matter content of 0~40cm soil depth is 1.7g/kg higher, exchangeable potassium is more than 0.091mg/g soil. Four years after, the soil density decreases by 0.20g/cm3, number of pests enemy is more than 3 times, pests decrease by 95%, fruit diseases decrease by 80%, first grade fruit yield is 27000kg/hm2, net income increases by 1338 yuan/hm2.

     

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