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To approach the impact of intensive and mulching management on nitrogen (N) and phosphorus (P) concentration and the ratio of N 颐P in soil and bamboo leaf, and clarify the degradation mechanism of Phyllostachys praecox plantation, the concentration of N and P elements in soil and leaf of Ph. praecox as well as its stoichiometry from bamboo stand with different mulching management treatments (6a, 3a and CK) were analyzed, and this research will provide theoretical guidence for regeneration of degraded bamboo plantations. The results showed that with soil depth increasing, soil N, P concentration among soil layers decreased. While with the time of mulching management extending, the concentration of N and P in soils increased significantly, and the ratio of N 颐 P in soil 0-20cm increased significantly for mulching management stands; and N, P contents were enriched in 0-20cm soil layers. However N decreased significantly in leaf and P decreased much significantly for leaf in stands of 3a and 6a. The ratio of N 颐 P was 14. 05-18. 39 in Ph. praecox leaves, and increased in 3a and 6a, which indicated that the function of P as key factor to limit the growth was enhanced. Furthermore the ratio of N 颐P in leaves had positive significant correlation with soil P content, and was negatively significant correlation with soil N 颐 P ratio and P content in leaves, but had no significant correlation with soil N concentration. Thus it was concluded that with the time of mulching management extending, the coefficient between soil N

收稿日期：２０１６• ０２• １５； 网络出版日期：２０１７• ０２• １７ * 通讯作者 Ｃｏｒｒｅｓｐｏｎｄｉｎｇ ａｕｔｈｏｒ．Ｅ•ｍａｉｌ： ｃｓｌｂａｍｂｏｏ＠ １２６．ｃｏｍ ＤＯＩ： １０．５８４６ ／ ｓｔｘｂ２０１６０２１５０２８２ 李迎春，陈双林，岳永德，刘玉芳，郭子武，杨清平．持续淹水对河竹器官养分元素分配格局的影响．生态学报，２０１７，３７(１０) ：３４８２• ３４９３． Ｌｉ Ｙ Ｃ， Ｃｈｅｎ Ｓ Ｌ， Ｙｕｅ Ｙ Ｄ，Ｌｉｕ Ｙ Ｆ， Ｇｕｏ Ｚ Ｗ， Ｙａｎｇ Ｑ Ｐ ．Ｅｆｆｅｃｔ ｏｆ ｃｏｎｔｉｎｕｏｕｓ ｆｌｏｏｄｉｎｇ ｓｔｒｅｓｓ ｏｎ ｎｕｔｒｉｅｎｔ ｅｌｅｍｅｎｔ ｄｉｓｔｒｉｂｕｔｉｏｎ ｐａｔｔｅｒｎｓ ｉｎ Ｐｈｙｌｌｏｓｔａｃｈｙｓ ｒｉｖａｌｉｓ ｍｏｄｕｌｅｓ．Ａｃｔａ Ｅｃｏｌｏｇｉｃａ Ｓｉｎｉｃａ，２０１７，３７(１０) ：３４８２• ３４９３．

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