施N肥对会同杉木人工林N、P含量的影响

摘要

Taken Chinese fir as research object in Ⅱ catchment in Huitong of Hunan Province,N fertilizer experiment was carried out on it,and taken sample for one year,to determine the effects of N fertilizer on N,P content and the cor-relation between N and P content in Chinese fir plantation and soil under different fertilization treatments.The results show that by applying fertilizer,contents of N and P in soil-root-leaf increase.Among them,applying N fertilizer 25 g/m2 in-creases more contents of N and P in the soil than applying N fertilizer 5 g/m2 and 15 g/m2 ,and applying N fertilizer 25 g/m2 increases contents of N and P in the root of the soil markedly.Applying N fertilizer 5 g/m2 increases contents of N in the leaf effects better than applying N fertilizer 15 g/m2 and 25 g/m2.Applying N fertilizer does not increase contents of N of litter.The increase of contents of N and P in the soil-root-leaf of Chinese fir plantation in Huitong shows that applying fertilizer helps the growing of Chinese fir plantation.%以湖南会同杉木基地Ⅱ号集水区杉木人工林为研究对象，对其进行施N肥实验，并进行一年期采样，测定不同施肥处理下N肥对杉木林N、P含量的影响及杉木器官与土壤N、P含量之间的相关关系。结果表明：施肥能够提高杉木土壤、细根、叶片的N和P含量，其中施N肥25 g／m2能提高土壤的N、P含量，施N肥25 g／m2比施N肥5 g／m2和15 g／m2更能提高土壤中细根的N、P含量，施N肥5 g／m2比施N肥15 g／m2和25 g／m2对提高叶片中的N含量的效果好，施N肥并未提高凋落物N含量。会同杉木人工林氮磷含量的增加说明施肥能够促进杉木林的生长。