The Effect of Bamboo and Fir Mixed Afforestation on the Soil Nutrient and Forest Trees Growth

Based on the investigation on the soil nutrient and forest growth amount of Cunninghamia lanceolata and Phyllostachys heterocycla pure forests and 7-year-old Cunninghamia lanceolata and Phyllostachys heterocycla mixed forest in Fangtian Township Siken Village,Ninghua County,the results showed that: the bamboo fir mixed forest soil organic matter,total nitrogen,total phosphorus,total kalium,hydrolysis phosphorus,rapidly-available phosphorus and rapidly-available kalium content of bamboo were higher than Phyllostachys heterocycla and Cunninghamia lanceolata pure forests,the average dbh,average height,height under branch,crown breadth,and individual volume growth were higher than Phyllostachys heterocycla and Cunninghamia lanceolata pure forests.