东北林业大学学报
東北林業大學學報
동북임업대학학보
JOURNAL OF NORTHEAST FORESTRY UNIVERSITY
2014年
3期
11-14
,共4页
林宇%张勇%黄秀勇%张松%何宗明%林思祖%官国栋
林宇%張勇%黃秀勇%張鬆%何宗明%林思祖%官國棟
림우%장용%황수용%장송%하종명%림사조%관국동
尾巨桉%凋落物%分解%滨海沙地
尾巨桉%凋落物%分解%濱海沙地
미거안%조락물%분해%빈해사지
Eucalyptus urophylla×E.grandis%Litter%Decomposition%Coastal sandy soil
应用尼龙网框收获法和网袋分解法,对沿海沙地10年生尾巨桉人工林的凋落物进行1 a的分析。结果表明:凋落物量在1 a中月动态呈“双峰”变化趋势,年总凋落物量为6745.93 kg· hm-2· a-1,每年归还林地的养分总量为212.09 kg· hm-2·a -1;凋落物不同组成营养元素质量分数不同,在所测定的营养元素中,N的归还量最大为69.89 kg· hm-2· a-1,占养分总归还量的32.95%;凋落物各组成中养分归还量由大到小的顺序为:叶、枝、皮、花果、碎屑。尾巨桉凋落物的分解速度表现为慢-快-慢模式,7月份分解速度最快;凋落物分解Olson指数模型为:Y=100· e-0.61383·t ,R2=0.973,说明该模型拟合程度高,分解50%和95%所用时间分别为1.13 a和4.88 a。
應用尼龍網框收穫法和網袋分解法,對沿海沙地10年生尾巨桉人工林的凋落物進行1 a的分析。結果錶明:凋落物量在1 a中月動態呈“雙峰”變化趨勢,年總凋落物量為6745.93 kg· hm-2· a-1,每年歸還林地的養分總量為212.09 kg· hm-2·a -1;凋落物不同組成營養元素質量分數不同,在所測定的營養元素中,N的歸還量最大為69.89 kg· hm-2· a-1,佔養分總歸還量的32.95%;凋落物各組成中養分歸還量由大到小的順序為:葉、枝、皮、花果、碎屑。尾巨桉凋落物的分解速度錶現為慢-快-慢模式,7月份分解速度最快;凋落物分解Olson指數模型為:Y=100· e-0.61383·t ,R2=0.973,說明該模型擬閤程度高,分解50%和95%所用時間分彆為1.13 a和4.88 a。
응용니룡망광수획법화망대분해법,대연해사지10년생미거안인공림적조락물진행1 a적분석。결과표명:조락물량재1 a중월동태정“쌍봉”변화추세,년총조락물량위6745.93 kg· hm-2· a-1,매년귀환임지적양분총량위212.09 kg· hm-2·a -1;조락물불동조성영양원소질량분수불동,재소측정적영양원소중,N적귀환량최대위69.89 kg· hm-2· a-1,점양분총귀환량적32.95%;조락물각조성중양분귀환량유대도소적순서위:협、지、피、화과、쇄설。미거안조락물적분해속도표현위만-쾌-만모식,7월빈분해속도최쾌;조락물분해Olson지수모형위:Y=100· e-0.61383·t ,R2=0.973,설명해모형의합정도고,분해50%화95%소용시간분별위1.13 a화4.88 a。
With the methods of nylon net box harvest and mesh bag decomposition , an experiment was conducted to analyze the litterfall over one year in ten-year-old Eucalyptus urophylla×E.grandis plantation on coastal sandy soil.The monthly dy-namics of total amount of litterfall showed the double-peak model, annual amount of litterfall was 6 745.93 kg· hm-2 , and the yearly amount of nutrient elements in litter returning to ground was 212.09 kg· hm-2 · a-1 .Different nutrient element content of litterfall was different.The amount of returned N was 69.89 kg· hm-2 · a-1 , accounting for 32.95%of the nu-trient return total amount.The nutrient of litterfall of returned amount was leaf>branch>bark>fruit and flower>detritus. The decomposition of litterfall showed slow-fast-slow model, and the litterfall decompose fastest in July.Olson index model of litterfall of decomposition was Y=100· e-0.613 83· t with R2=0.973 and good regression.It took about 1.13 a and 4.88 a, when 50%and 95%of litterfall was decomposed, respectively.