This paper dealt with a study on the nutrient status of litter collected in different phases from 2002 to 2003 in winter or summer in reclamation and non-reclamation pure Phyllostachys pubescens stands or mixed P.pube...This paper dealt with a study on the nutrient status of litter collected in different phases from 2002 to 2003 in winter or summer in reclamation and non-reclamation pure Phyllostachys pubescens stands or mixed P.pubescens stands with broadleaved trees by means of fixed monitoring in Luxi and Jianshan forest region,Fuyang County,Zhejiang Province.ANOVA results showed that the dry weight of litter in non-reclamation P.pubescens stands was higher than reclamation pure P.pubescens stands while it significantly reduced after reclamation.It indicated that the average dry weight of litter in non-reclamation P.pubescens stands was 2.13～2.46 times the size of reclamation stands in winter or summer,while that in mixed bamboo stands was 3.07～3.65 or 1.79～2.27 times the size of non-reclamation stands or reclamation stands respectively.It also appeared absolutely the same variation characteristics as order of nutrient content or storage of litter between non-reclamation pure and mixed P.pubescens stands were as follows:N,Ca,K,Mg,P,whereas the order of nutrient content or storage of litter in winter or summer in reclamation pure stands were as follows:Ca,K,N,P,Mg.Nutrient content of litter in reclamation bamboo stands ranged 0.2～5.1 g·kg-1 while nutrient storage from 0.51 to 22.46 kg·hm-2,nutrient content of non-reclamation bamboo stand ranged 0.29～19.81 g·kg-1 while nutrient storage from 2.11 to 57.29 kg·hm-2 and it ranged 0.52～19.89 g·kg-1 while nutrient storage from 3.74 to 236.37 kg·hm-2 in mixed bamboo stands.Therefore it must be pay sufficient attention to soil management for reclamation can restrict improving potential soil fertility as greatly reduced amount of litter on surface in bamboo stands although it can improve soil structure and moisture condition.展开更多
The nutrient content in five forests including Acacia mangium,A.auriculaeformis,Eucalyptus citriodora,Pinus elliotii and Schima superba were studied.The branch and root of different diameter,leaf,trunk and bark were s...The nutrient content in five forests including Acacia mangium,A.auriculaeformis,Eucalyptus citriodora,Pinus elliotii and Schima superba were studied.The branch and root of different diameter,leaf,trunk and bark were sampled.N,P,K,Na,Ca,Mg,Fe and Mn were analysed.The results showed that the nutrient content had a opposiee relationship with diameter of branch and root.The nutrient content followed a pattern of leaf>branch>root.Very low level of sodium was detected for organs of S.superba and P.Elliotii except for root.The five forests had rather different nutrient contents,though,as legume species,A.mangium and A.auriculaeformis were similar in some elements,especially in N content.展开更多
文摘This paper dealt with a study on the nutrient status of litter collected in different phases from 2002 to 2003 in winter or summer in reclamation and non-reclamation pure Phyllostachys pubescens stands or mixed P.pubescens stands with broadleaved trees by means of fixed monitoring in Luxi and Jianshan forest region,Fuyang County,Zhejiang Province.ANOVA results showed that the dry weight of litter in non-reclamation P.pubescens stands was higher than reclamation pure P.pubescens stands while it significantly reduced after reclamation.It indicated that the average dry weight of litter in non-reclamation P.pubescens stands was 2.13～2.46 times the size of reclamation stands in winter or summer,while that in mixed bamboo stands was 3.07～3.65 or 1.79～2.27 times the size of non-reclamation stands or reclamation stands respectively.It also appeared absolutely the same variation characteristics as order of nutrient content or storage of litter between non-reclamation pure and mixed P.pubescens stands were as follows:N,Ca,K,Mg,P,whereas the order of nutrient content or storage of litter in winter or summer in reclamation pure stands were as follows:Ca,K,N,P,Mg.Nutrient content of litter in reclamation bamboo stands ranged 0.2～5.1 g·kg-1 while nutrient storage from 0.51 to 22.46 kg·hm-2,nutrient content of non-reclamation bamboo stand ranged 0.29～19.81 g·kg-1 while nutrient storage from 2.11 to 57.29 kg·hm-2 and it ranged 0.52～19.89 g·kg-1 while nutrient storage from 3.74 to 236.37 kg·hm-2 in mixed bamboo stands.Therefore it must be pay sufficient attention to soil management for reclamation can restrict improving potential soil fertility as greatly reduced amount of litter on surface in bamboo stands although it can improve soil structure and moisture condition.
文摘The nutrient content in five forests including Acacia mangium,A.auriculaeformis,Eucalyptus citriodora,Pinus elliotii and Schima superba were studied.The branch and root of different diameter,leaf,trunk and bark were sampled.N,P,K,Na,Ca,Mg,Fe and Mn were analysed.The results showed that the nutrient content had a opposiee relationship with diameter of branch and root.The nutrient content followed a pattern of leaf>branch>root.Very low level of sodium was detected for organs of S.superba and P.Elliotii except for root.The five forests had rather different nutrient contents,though,as legume species,A.mangium and A.auriculaeformis were similar in some elements,especially in N content.
