Research On Crop Rhizosphere Effects Of Winter Crops In Paddy Fields

In order to solve the problem of paddy fields sustainable development of poyang lake ecologicaleconomic zone, through the crop rhizosphere effect to reflect soil ecological characteristics of the“wintercrops–doublerice”farmland,this studyclarifytheecological benefits betweendifferent wintermodes from the angle of the rhizosphere microenvironment, and then provide theoretical and practicalbasis for cropping land sustainable utilization.(1) For the non-rhizosphere soil nutrient, potato has an improvement on the soil organic matter,total nitrogen, total potassium, alkali-hydrolyzale nitrogen, available phosphorus and availablepotassium. Chinese milk vetch has an improvement on the soil total phosphorus and alkali-hydrolyzalenitrogen. Rapeseed has an improvement on the soil total potassium and alkali-hydrolyzale nitrogen.Garlic has an improvement on the soil available phosphorus.(2) For the rhizosphere soil nutrient, potato has an improvement on the soil pH, organic matter,total nitrogen, available phosphorus and available potassium. Chinese milk vetch has an improvementon the soil organic matter, alkali-hydrolyzale nitrogen and available phosphorus. Rapeseed has animprovement on the soil total potassium and available phosphorus. Garlic has an improvement on thesoil organic matter and available phosphorus.(3) For the non-rhizosphere soil microorganism, Chinese milk vetch has an improvement on thesoil bacteria. Rapeseed has an improvement on the soil epiphyte. Compared with winter fallow,Chinese milk vetch, rapeseed and garlic have a reduced effect on the soil actinomycetes. And Chinesemilk vetch, rapeseed, garlic and potato have a reduced effect on the soil azotobacter.(4) For the rhizosphere soil microorganism, it has a bigger difference during the period of wintercrops. Compared with winter fallow, Chinese milk vetch, rapeseed, garlic and potato have animprovement on the soil bacteria and azotobacter. Garlic has the obviously higher epiphyte during theperiod of late rice.(5) For the soil nutrient rhizosphere effect, during the period of early rice, Chinese milk vetchcould obviously improve the rhizosphere pH microenvironment. Potato could obviously improve therhizosphere total potassium microenvironment, but Rapeseed couldn’t. During the period of late rice,Chinese milk vetch could obviously improve the rhizosphere total nitrogen microenvironment, butcouldn’t the alkali-hydrolyzale nitrogen. Rapeseed could obviously improve the rhizosphere availablephosphorus microenvironment. Garlic could obviously improve the rhizosphere alkali-hydrolyzalenitrogen, available potassium microenvironment.(6) For the soil microorganism rhizosphere effect, during the period of early rice, all modes werenot obvious. During the period of late rice, Chinese milk vetch could obviously improve the rhizosphereazotobacter microenvironment. Rapeseed could obviously improve the rhizosphere actinomycetesmicroenvironment. Garlic could obviously improve the rhizosphere actinomycetes, azotobactermicroenvironment.