Study On The Effect Of Different Fertilization Treatments On Young Chinese Fir Plantation

Taking the biennial fir young forest of the vegetation planting base of Guangping Township Ecological Station in Huitong City,Hunan Province as experimental materials,54 fertilization methods were applied,and the changes in the N,P and K content of the trees before and after fertilization were analyzed by using variance analysis and correlation calculation by means of variance analysis and correlation calculation.The purpose is to solve the problem of soil maintenance in the production of fir and provide a theoretical basis for the improvement of the technical level of the development of China’s fir industry.The main findings are as follows:(1)After different fertilization treatments,the height diameter of the trees in the young forests of fir plantations has increased compared with before fertilization.(2)Different fertilization treatments significantly affected the growth of young fir forests.The highest growth rate of trees was N:P:K=2:1:1;The amount of diameter growth was the highest in the fertilization ratio N:P:K=2:2:2.When humic acid was used,the highest tree growth rate was treated with F+with a concentration gradient of 45 g/L humic acid,and higher than the maximum value of unused humic acid,and the treatment was N2,P3,K2.When humic acid was used,the highest tree growth was treated with D+with a concentration gradient of 75 g/L humic acid,which was higher than the maximum value of no humic acid,and its treatment was N2,P1,K2.(3)There were differences in nutrient content among the components of young forests in fir plantations,all of which had the highest N content;The N content of each part is>roots of leaf>branches;P Content is>leaf branches>roots;The K content is>roots of branches>leaves,and the N,P and K content of the roots are the lowest.(4)The fertilization of different formulas such as N,P,K and so on can increase the accumulation of nutrients in the organs of the young forests of biennial fir trees.The effect of different formulas of fertilization on different parts of the fir nutrients is different,but the concentration of N in each organ in the fir is significantly changed by different treatment methods,and the increase and change of the fertilizer application of branches to P are also more sensitive,and the content of branch P is significantly increased.Under the fertilization of different formulas,the K content of each organ of fir tree was greater than that before fertilization,but there was no significant difference in the change.The absorption law and trend of nutrients after fertilization treatment and untroptilization treatment are consistent,indicating that the absorption efficiency of nutrients by fertilization on fir trees has basically not changed,and only the absorption rate of nutrients has been increased.(5)There is a significant positive correlation between the diameter and the height of the tree(p<0.01),indicating that the diameter of the ground increases with the growth of the tree height.There is.also a very obvious positive correlation between the size of the tree height diameter and the N concentration in the roots,branches and leaves of the fir tree(p<0.01);In addition to the very obvious negative correlation with the P concentration of the root system,the P concentration of branches and leaves and the K concentration of roots,branches and leaves showed a very obvious positive correlation(p<0.01).Therefore,the nutrient content of roots,branches and leaves of fir directly affects the growth and development of fir.(6)The high ground diameter of young trees in fir plantations was positively correlated with the N and K contents of soil layers of 0-30 cm(P<0.01),and only the P content of soil 0-10 cm soil layer was significantly positively correlated(p<0.05);The P content of 10 minus 30 cm soil in the soil was not significantly related to the height diameter of the tree.The elevation path of the young forest of fir plantation is directly affected by the soil nutrient environment,indicating that the growth and development of the young forest of fir is closely related to the soil environment.