施肥对交趾黄檀幼龄林生长和养分分配的影响

Effects of Fertilization on Growth and Nutrient Allocation of Young Forest for Dalbergia cochinchinensis

以1年生交趾黄檀Dalbergia cochinchinensis幼龄林为研究材料,采用不同的基肥和追肥处理对幼龄林的生长和不同组织器官的养分含量进行分析,同时通过隶属函数值综合评价交趾黄檀幼龄林对对不同施肥处理的综合响应。结果表明:合理施肥能显著促进交趾黄檀幼树的生长,在添加复合肥2 kg作为基肥,每隔3个月追肥0.25 kg(T6)时,幼林树高和地径生长表现最佳,分别达到189.58 cm和38.24 cm。施肥处理有利于苗木的鲜质量、地上生物量和植株总生物量的积累。施肥对交趾黄檀人工幼龄林林木营养元素分配影响明显,最佳施肥处理的根、茎和叶的N元素含量分别提高了97.29%、105.06%和59.83%。综合评价得出:通过添加复合肥2 kg作为基肥,每隔3个月追肥0.25 kg的施肥方式对交趾黄檀幼林的生长和养分分配综合效益影响最好。

The fertilization methods and fertilizer amounts were selected based on the comprehensive analysis of membership function for the young stage of afforestation of Dalbergia cochinchinensis.Using young stage of afforestation of D.cochinchinensis as research materials,the tree growth and nutrient content of different tissues were estimated using ANOVA and Duncan test,and the comprehensive benefit of the different fertilization methods were evaluated by the subjection function value.The treatment T6 involving base fertilizer with 2 kg and topdressing 0.25 kg every 3 months was significantly improved the growth of young trees,the tree height and ground diameter were 189.58 cm and 38.24 cm,respectively.Fertilization treatment was conducive to the accumulation of fresh quality,aboveground biomass and total biomass of seedlings.The distribution of nutrient elements in young plantation of D.cochinchinensis was significant effect by fertilization.With best fertilization treatment,the N content of roots,stems and leaves increased by 97.29%,105.06% and 59.83%,respectively.In the comprehensive evaluation,the treatment involving base fertilizer with 2 kg and topdressing 0.25 kg every 3 months had the best influence on the growth and nutrient allocation in the young stage of D.cochinchinensis.The results from this study can be used as a reference for early stages of D.cochinchinensis plantation growth.