基于有机-无机配施的旱坡地柑桔园资源节约型施肥模式效益评价研究

应用现代堆肥技术实现工农业废弃物的资源化，并以其产品（精制有机肥）为载体，运用循环经济的方法构建柑桔有机-无机肥料配施的资源节约型施肥模式，把传统的依赖化肥消耗的线性增长的经济体系，转变为依靠节约型农业资源循环来发展的经济体系，研究旱坡地柑桔园施用精制有机肥的效益评价。结果表明，与100%化肥处理（CK）相比，80%化肥＋20%有机肥（T1）、60%化肥＋40%有机肥（T2）、100%有机肥（T3）处理沙糖桔产量分别增产11.1%～18.4%、13.0%～19.9%和10.2%～18.2%，有机-肥配施化肥（T1、T2）处理、T3处理的沙糖桔果实维生素C含量连续3年平均提高23.4 mg/kg；可溶糖含量平均提高1.5个百分点。从经济和环境效益来考察，T1处理获得的经济效益最高（55020元/hm2），T2处理和CK处理次之，T3处理最低。产投比为T1＞CK＞T2＞T3处理。

Research and investigation on effects of conservation-oriented mode of combining organic and inorganic fertilizers in sloping-land citrus orchards

Modern compost technology was applied to realize reclamation of industry and agricultural waste,and the product （purified organic fertilizer） of it was used in circular economy way to build conservation-oriented fertilization mode of combining organic and inorganic fertilizers in citrus orchards.In this way,traditional economic system in which linear growth depended on chemical fertilizer consumption can be converted into the one in which linear growth depended on conservation-oriented agricultural circular economy.What ＇ s more,research on effects of applying purified organic fertilizers in sloping-land citrus orchards was also conducted.It showed that compared with the result of applying 100% chemical fertilizer in citrus orchards （CK）,the result of combining 80% chemical fertilizer and 20% organic fertilizer （T 1）,the result of combining 60% chemical fertilizer and 40% organic fertilizer （T 2）,and the result of applying 100% organic fertilizer （T 3）,respectively increased the citrus yields at 11.1%～18.4%,13.0%～19.9% and 10.2%～18.2%.The combination fertilization mode of organic fertilizer and chemical fertilizer （mode T 1 and mode T 2） as well as mode T 3 enable vitamin C content of citrus increased 23.4 mg/kg successively on average in 3 years;and the soluble sugar content of citrus increased 1.5 percentage on average.Considering economic and environmental effects,the economic benefit of T 1 mode was the highest （55020 RMB/hm 2）,that of T 2 mode and CK mode took the second and third place,and that of T 3 mode ranks last.Value to cost ratio（VCR） of the four modes ranked as T 1 CK T 2 T 3.