Improvement of Wolfberry(Lycium barbarum L.)Fruit Yield and Quality and Enhancement of Soil Fertility by Nitrogen Reduction Combined with Organic Fertilizers  

作　　者：Yajun Xin Congcong Li Tingting Xu Youliang Wang Rong Fu Tahir Shah Shouzhong Xie Rong Zhang Haiyan Sheng Yajun Gao 

机构地区：[1]College of Natural Resources and Environment,Northwest A&F University,Yangling 712100,Shaanxi,China [2]State Key Laboratory of Plateau Ecology and Agriculture,Qinghai University,Xining 810016,Qinghai,China [3]Soil and Fertilizer Institute,Academy of Agricultural and Forestry,Qinghai University,Xining 810016,Qinghai,China [4]Nuomuhong Farm,Dulan 816199,Qinghai,China [5]College of Agriculture and Animal Husbandry,Qinghai University,Xining 810016,Qinghai,China

出　　处：《Journal of Agricultural Science and Technology(A)》2024年第1期1-18,共18页农业科学与技术（A）

基　　金：supported by The Open Project of State Key Laboratory of Plateau Ecology and Agriculture,Qinghai University(2020-KF-001);the Grand S&T Project of Qinghai Province(2019-NK-A11);the Key R&D Project of Qinghai Province(2018-NK-128).

摘　　要：Excessive amounts of nitrogen(N)fertilizers are applied during wolfberry production,resulting in some soil problems as well as potential environmental risks in the Qinghai-Tibet Plateau.In this study,organic fertilizers were used to replace part of the N fertilizer in wolfberry fields with different fertility levels.N fertilizer rates had 0,50,100,150,200,and 250 g N/plant.Organic fertilizer rates had 0,2,4,6,8,and 10 kg organic fertilizer/plant.The experimental treatments included 6 combinations of N0M10,N50M8,N100M6,N150M4,N200M2,and control was N250M0.The results showed that in the high-fertility soils,combinations of N150M4,N100M6 and N50M8 treatments were increased in yields,fruit shape index,flavonoid content,total phenol content,mineral nutrient content,and antioxidant activity of wolfberry fruits.Also they were improved in soil fertility and decreased in residual nitrate through the soil depth of 0-300 cm.In the soil with less fertility,fruit yield,amino acid contents,flavonoids,total phenols,mineral nutrients and antioxidant activity of fruits were increased by the N200M2,N150M4 and N100M6 treatments and soil fertility was improved as well.Also more residual nitrate was found in the depth of 0-100 cm of soil with both chemical and organic fertilizer compared with the control.Therefore,in the Qinghai-Tibet Plateau,combining decreased N fertilizer with organic fertilizer rather than chemical fertilizer alone could help farmers achieve satisfactory yields and quality of wolfberry fruits and reduce the risk of nitrate leaching.In conclusion,50-150 g/plant of N fertilizer combined with 4-8 kg/plant of organic fertilizer in high-fertility gardens and 100-200 g/plant of N fertilizer combined with 2-6 kg/plant of organic fertilizer in low-fertility gardens are recommended for wolfberry cultivation.

关 键 词：WOLFBERRY fruit quality antioxidant activity organic fertilizer nitrogen fertilizer 

分 类 号：S15[农业科学—土壤学]