施肥对杉木实生苗某些生理特性和土壤养分的影响

Effects of fertilization on some physiological traits of Chinese fir seedling and soil nutrient

采用客土苗床, 对1 年生杉木实生苗进行了施肥试验。结果表明: 化肥、有机肥和化肥有机肥混施3 个用肥水平一致的处理的杉木苗生物量、根系活力和叶绿素质量分数分别是不施肥对照处理的2-05 , 1-60 , 2-11 倍, 1-24 , 1-75 , 1-44 倍和1-35 , 1-40 , 1-52 倍。施足有机肥后再加一定量化肥仍有改善苗木生理性质的作用。施肥还很好地维持了地力。施用有机肥显著提高了土壤有机质和全氮质量分数。所有施肥处理均明显使土壤有效养分增加。表4

In foreign soil seedbeds,urea(N),calcium superphosphate(P),potassium chloride(K) and decayed cake manure(M) were applicated for 2 weeks before planting Chinese fir year seedling in March.Application rate was as follows:A plot,check;B,N 50 0 g·m -2 ,P 45 0 g·m -2 ,K 30 0 g·m -2 ;C,M 600 0 g·m -2 ;D,N 25 0 g·m -2 ,P 22 5 g·m -2 ,K 15 0 g·m -2 ,M 300 0 g·m -2 ;E,M 600 0 g·m -2 ,N 50 0 g·m -2 ,P 45 0 g·m -2 ,and K 30 0 g·m -2 .The results of analysis in September indicated that fertilization was of great value for improving biomass,root vigor and chlorophyll content of Chinese fir seedling.In comparison with A,biomass,root vigor and chlorophyll content of seedling in B,C and D were 2 05,1 60,2 11 times,1 24,1 75,1 44 times,and 1 35,1 40,1 52 times,respectively.E was of great effect for improving physiological function of seedling.Fertilization increased not only land capability,but also available nutrient of soil.