| The investigation into tea gardens soils in mountainous areas of central in Guizhou,sample collection,analysis and field fertilization experiments were conducted to explore the effects of organic materials on the growth of tea plants and their effects on soil fertility.At the same time,maize straw,green manure,biomass charcoal topsoil,and corn straw,green manure,biomass charcoal,and pig manure were used to improve the soil under potting conditions.Soil water content,soil temperature,and soil nitrogen was monitored regularly for planting tea.Changes in the contents of phosphorus,potassium and potassium;explored the impact on different types of organic materials on soil moisture,temperature and nutrients in tea planting,and the response to the growth of spring tea,providing a reference to tea plantation production and management.In this study,the effects of different types of organic materials on soil moisture,temperature,and nutrients in tea planting were investigated through field vegetation survey,sampling analysis,and potted plant experiments.The preliminary conclusions are as follows:(1)The application of pig manure compost,green manure and biogas residue in tea plantation can significantly increase the soil moisture content,especially green manure;meanwhile,the content of effective nitrogen,available phosphorus and available potassium in tea garden soil increased by 53.27%~73.83% and 7.81%~28.12 and 10.24%~23.62%;The use of pig manure composting can greatly increase the actual level of soil available nitrogen,and can play a very positive effect on the improvement of the content of effective potassium.Besides,the application of green manure can obviously increase the content of nitrogen and increase the actual content of available nitrogen in soil.Biogas residue can further increase the potassium content in soil.The order for the effect of three organic fertilizers on the tea bud density,the number of spring shoots,and the leaf area in tea plantation trials was in the following order: pig manure compost> green manure> biogas residue;and the promotion effect on tea hundred shoot weight and spring tip length.For pig manure> green manure> biogas residue;pig manure composting promotes the growth of tea shoots,increases the density of buds and hundred shoots of tea,and increases the area of spring tea,which significantly increases the yield of spring tea.(2)Different types of organic materials covering the topsoil and applied to the soil all help to improve the water retention capacity of the spring tea planting soil.The order for the sizes is: corn stalk covering> corn stalk application> biomass charcoal coating> green manure coating> pig manure application> biomass carbon Application> Green manure application.In the late spring rainfall period and drought period,the application of corn straw can significantly increase the soil moisture content,and the corn straw mulching only showed obvious water retention effect in the soil during the late spring drought period.In the late spring drought period,the soil covered by biomass charcoal also showed significant water retention effect,but biomass carbon application did not significantly increase the soil moisture content.In addition,biomass carbon and green manure have a significant warming effect in the low temperature period in spring,and in the steady rising stage of temperature in spring,they show a more obvious cool effect,which can significantly reduce the amplitude of soil temperature.(3)The use of biomass charcoal,corn stalks,and green manure significantly increased the soil available N content in topsoil,and biomass charcoal also significantly increased soil available potassium content.The effect of organic material application for improving soil nutrient availability was even more significant.The average content of soil alkaline dissolved nitrogen increased by 39.42%,29.53%,43.59%,and 59.01%,respectively,after application of green manure,corn stalks,biomass charcoal,and pig manure.The average content of available potassium in soil increased by 26.02%,20.84%,45.42%,and 37.71%,respectively.The simultaneous application of green manure,biomass charcoal,and pig manure significantly increased soil available phosphorus content.Among them,pig manure application has better effect on increasing soil available nitrogen and available phosphorus,while biomass charcoal application can increase the amount of soil available potassium.(4)The use of corn stalks and green manure to cover the surface soil can significantly increase the total leaf area of the tea shoots.Biochar and pig manure application can significantly increase the length of spring shoots,the number of spring shoots,and the total leaf area.In addition,the application of green manure is also significant.Can significantly increase the total leaf area of dominant spring shoots.Corn stalks coverage,green manure application and green manure application,biomass carbon application,and pig manure application all significantly increased the total leaf area of tea shoots,increased spring tea yields,especially pig manure,followed by application of biomass charcoal.(5)There was a significant positive correlation between the length of spring shoots,number of leaves and total leaf area,and the available nitrogen,available phosphorus,and available potassium in tea planting soils.There was also a significant positive correlation between the total leaf area of spring shoots and soil organic matter.Sexuality shows that the yield of spring tea is mainly affected by the level of available soil nutrient content,and it is also closely related to the content of soil organic matter.The use of biomass charcoal,green manure covering the topsoil,and the application of corn stalks,biomass charcoal,green manure and pig manure are all conducive to the increase of effective soil nutrient content,thus promoting the growth of spring tea. |
PDF Full Text Request