Effects of Different Organic Fertilizers on the Quality of Jujube (Ziziphus mauritiana Lam.)

Abstract

This study was conducted to evaluate the effects of different organic fertilizers, i.e. powdery animal compost 10, 20 and 30 kilogram, powdery miscellaneous compost 10, 20 and 30 kilogram, granular miscellaneous compost 10 and 20 kg/plant/year, respectively on the soil properties, plant nutrition and quality of jujube cultivated on the weakly acid soil. The results showed that the soil properties and leaf nutritions of jujube were influenced by the types and the amount of composts. Soil pH, organic matter and fertility were increased for the application of organic fertilizer than the treatments of non-organic fertilizer. On the other hand, the concentration of nitrogen, potassium and microelements in the leaves were all reduced at the anthesis stage, however, the phophorus was increased for the application of organic fertilizers. The application of organic fertilizers will supply the efficient phosphorus and microelements for the anthesis and increasing of fruit quality. The quality test of jujube showed that the application of three types of organic fertilizer will increase the quality of jujube than the treatment of no organic fertilizer. The application of powdery miscellaneous compost for 20-30 kilogram per plant will increase the fruit weight and sugar degree of jujube than the applications of different amount of powdery animal compost and granular miscellaneous compost.