6种豆科绿肥植物与苹果树套种对果园土壤碳氮特征的影响

为探明豆科植物与果树套种对山地果园土壤碳氮含量特征的影响,本研究以无芒雀麦(Bromus inermis Ley-ss)为参比植物,以6种豆科作物T1:箭筈豌豆(Vicia sativa L.)、T2:大鹁鸽灰豌豆(Pisum Large pigeon L.)、T3:绿豆(Phaseolusradiatus L.)、...

Effects of Interplanting Six Leguminous Green Manure Plants in Apple Orchard on Soil Carbon and Nitrogen Characteristics

To explore the effects of interplanting six legume with apple trees on carbon and nitrogen content in northwest arid orchard soil Field experiments taking Bromus inermis Leyss as the reference plant and 6 legume crops(numbered:T1-T6)as green manure plants were conducted.15 N natural abundance method and Kjeldahl method were used to detect plant nitrogen fixation and soil carbon and nitrogen content.The nitrogen fixation amount of the six green manure plants in the season was between 20.22 g·cm^-2~39.14 g·cm^-2,with T5 being the highest;After half a year,T4 had the highest total N content of legume rhizosphere soil,which was 155.48%,the alkali hydrolyzed nitrogen was 44.29 mg·Kg^-1 with the highest being T2,and the increase of microbial biomass nitrogen was 7.66%~38.74%.The total organic carbon content of soil was 22.66 g·Kg^-1 with T5 being the highest;For active organic carbon,T4 was the highest and T6 was the lowest content of 3.04 g·Kg^-1 and 2.39 g·Kg^-1,respectively.The highest increase of inactive organic carbon was T5,which was 1.15 times of the control,and the highest soluble organic carbon was T4 being 0.58 g·Kg^-1.There was a positive correlation between soil microbial biomass carbon and total organic carbon and active organic carbon content.Principal component weight analysis showed the order of six plant effects on soil carbon and nitrogen content characteristics was T2>T4>T3>T5>T6>T1.