| Camellia sinensis clippings(tea garden clippings)is an important work in the management of tea garden.In order to ensure the healthy growth of tea and tea production,we cut a lot of tea garden clippings every year.And the processing of these scratches is not handled in different areas.Of course,different treatment methods will lead to different environmental effects.In this study,the effects of tea garden clippings on the soil properties of tea garden and the effects on the greenhouse soil emissions from tea plantations will be discussed through a series of experiments.It will provide relevant reference for the tea garden scientific management measures.In this study,the experiment was conducted by orthogonal design L9(34)test method to discuss different concentrations of tea garden clippings biochar(tea biochar)[0(CO)、7.11(C1)、4.22(C2)g·kg-1 soil],tea garden clippings[0(XO)、21.33(X1)、42.66(X2)g·kg-1 soil]mixed with urea[0(N0)、0.125(N1)、0.25(N2)g·kg-1 soil]impact on the soil of tea garden.The conclusions drawn include the following:1 Tea biochar repairs to field,there was a significant positive correlation with the soil pH in the range of 0 to 32 t ·hm-2,but not significant.There was a positive correlation with the available P,the correlation coefficient was 0.175,which was positively correlated with the soil available K content.And the correlation coefficient was 0.465 and 0.825,respectively.There was a significant positive correlation between total N and organic matter content in tea soil.The correlation coefficients were-0.311 and-0.364,respectively;and positively correlated with urease,the coefficient was 0.210.which was positively correlated with CH4 emission and negatively correlated with CO2 and N2O,the correlation coefficients were 0.418,-0.468 and-0.358,respectively.Indicating that the tea biomass carbon was added to the soil,effectively increasing the soil available P,available K,total N and organic matter’s content;significantly reduce CO2 and N2O emissions.Therefore,it is concluded that tea biochar can effectively improve soil fertility and reduce greenhouse gas emissions effectively.2 Tea garden clippings repairs to field,there was a significant positive correlation with the pH value,total N and organic matter in the soil of 0 to 196 t · hm-2,and the correlation coefficients were 0.767,0.743 and 0.443,respectively.It’s negatively correlated with available P and available K,the correlation coefficients were-0.525 and-0.104,respectively.It’s positively correlated with soil urease,sucrase and nitrate reductase,the correlation coefficients were 0.714,0.388 and 0.358,respectively.It’s positively correlated with the emission of CO2、N2O and CH4,and the correlation coefficients were 0.739,0.182 and 0.182,respectively.The results showed that tea garden clippings could effectively increase soil’s pH,total N and organic matter,and could also increase the activity of soil’s urease,sucrase and nitrate reductase.But the tea garden soil’s greenhouse gas emissions have a significant increase in the effect.3 There was a significant positive correlation between urea and N2O emission in tea soil,and positively correlated with CO2 and CH4 emissions.The correlation coefficients were 8.59,0.219 and 0.019,respectively.It’s positively correlated with the GWP and PNR,the correlation coefficients were 0.863 And 0.452,respectively.Indicating that the addition of urea to the tea garden soil can significantly promote the soil’s N2O and CO2 emissions of tea garden soil.That is,urea can increase the greenhouse soil greenhouse gas emissions.4 Tea biochar and tea garden clippings have increased the tea garden soil’s fertility.However,tea biochar has a significant inhibitory effect on soil’s greenhouse gas emissions from tea garden soil,while tea garden clippings can significantly promote soil greenhouse gas emissions in tea gardens.Therefore,in the management of the tea garden,the tea biochar is still more effective than the tea tree trimming directly to reduce the impact of agricultural production on the environment. |
