| Juglans region has been planted in DuAn County of Guangxi,which can promote the control of rocky desertification and increase the income of agriculture,and promote the economic development and ecological environment of DuAn County.Soil nutrient is the foundation of growth and development of walnut.In this study,soil physical properties of walnut forest in different regions were investigated and analyzed by investigating and sampling the soil of walnut forest in DuAn County,Guangxi,in order to explore the change of soil physical properties of walnut forest.Differences of soil nutrients between Juglans bulbous and Yunxin walnut in DuAn County provide data support for the promotion,distribution and sustainable development of walnut industryThe main results are as follows:(1)The soil samples of walnut forest in Du'an County are mainly neutral and acidic soils.The alkaline soil is mainly in the northern towns of Du'an County and the pH value of most walnut gardens is suitable for walnut growth.(2)The average content of organic matter in soil of walnut forest in DuAn County was(3.54± 1.10)%,Organic matter is more abundant.(3)The total nitrogen level of walnut forest soil was rich,and the total nitrogen content of grade 2 and grade 3 was the main one.The soil total phosphorus level of walnut forest was graded at moderately low level.The total potassium content in the soil is at a low level,and there is even a serious state of potassium deficiency.(4)The level of available phosphorus in the soil of walnut forest is low;the level of hydrolyzed nitrogen is moderate and maintained at a high level;while the level of available potassium is moderate and maintained at a high level.The majority of nutrients in the walnut forest soil in Du'an County are significantly correlated.(5)The main difference in soil in the north and south of Du'an County was mainly exchangeable magnesium(P<0.01);the main difference in soil between east and west of Du'an County was mainly phosphorus and available phosphorus(P<0.05);Yunxin walnut The content of exchangeable magnesium,available potassium and exchangeable calcium was significantly lower than that of Dahua walnut forest(P<0.05).The effective zinc content in Yunxin walnut forest soil was significantly higher than that in large foam walnut forest(P<0.05).(6)The content of exchangeable magnesium and effective copper in high altitude areas(>400m)is significantly lower than that in low altitude areas(<400m)(P<0.05);total potassium in the soil at low altitudes,total nitrogen,effective The content of boron,organic matter and available potassium was lower than that of soil in low altitude(P<0.05).(7)From the distribution of soil fertility index,mainly soils of type ?soil and soil of type ?,soil fertility is better,but organic phosphorus and available iron content are lower,and class ? is less distributed,mainly concentrated in alkaline soil.Area(Yong'an Town and Laren Town).The soil deficiency elements are mainly nitrogen,phosphorus,potassium and iron,and a small amount of soil has a low manganese content. |
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