本文選題：無性系 + 杉木�。� 參考：《浙江農(nóng)林大學》2017年碩士論文

【摘要】：杉木[Cunninghamia lanceolata(lamb.)Hook]是我國特有的速生用材樹種之一,具有良好的經(jīng)濟價值和生態(tài)價值。前人對于杉木連栽的生長量及對土壤理化性質(zhì)的影響已有較多的研究,但往往只是針對單一品系而進行的。本論文的科學問題是不同杉木無性系具有不同的生長特性,對于連栽后的生物量碳及土壤質(zhì)量必定會產(chǎn)生較大的影響。針對上述問題,在前人研究的基礎上,調(diào)查了浙江省開化縣林場‘B44’、‘K13’、‘KT13’、‘F13×那1’和‘CK’等5個無性系一、二代杉木林分的生物量碳儲量,同時采集并分析了相應林地土壤有機碳、溶解性有機碳氮、微生物量碳氮、土壤酶等肥力指標。主要研究結(jié)果如下:(1)5個杉木無性系的高生長在同一代際之間沒有顯著性差異;二代栽培明顯減緩了‘CK’、‘F13×那1’、‘KT13’和‘B44’4個無性系的胸徑生長量(P0.05),平均下降了14.4%。(2)5個杉木無性系的生物量碳儲量及年固碳量較大的差異。除無性系‘K13’外,其它4個無性系二代栽培生物量碳顯著低于一代(P0.05)。二代栽培明顯減緩了杉木的年固碳量,平均下降了30.40%,其中以‘K13’下降的幅度最小,僅下降13.30%。(3)二代栽培杉木林地土壤有效磷、土壤微生物量碳、土壤蔗糖酶、土壤水溶性有機碳氮比顯著下降(P0.05)。(4)杉木生物量碳與13個土壤質(zhì)量因子的回歸方程為:Y=-96.01-14.69X_1+1.51X_3+0.36X_6+7.35X_7+0.09X_9+95.87X_(11)-5.71X_(12)-3.40X_(13)。杉木生物量碳與土壤有效磷、有機碳、水溶性有機碳、水溶性有機氮、過氧化氫酶等5個指標有極顯著正相關(P0.01),而與土壤pH、酸性磷酸酶和蔗糖酶呈極顯著負相關(P0.01)。
[Abstract]:Chinese fir [Cunninghamia lanceolata(lamb.)Hook] is one of the special fast growing timber species in China, which has good economic and ecological value. Previous studies on the growth of Chinese fir and the effects on soil physical and chemical properties have been carried out, but only for a single strain of Chinese fir (Cunninghamia lanceolata). The scientific problem in this paper is that different clones of Chinese fir have different growth characteristics, which will have a great influence on biomass carbon and soil quality after continuous planting of Cunninghamia lanceolata (Cunninghamia lanceolata). In view of the above problems, based on the previous studies, the biomass carbon reserves of the first and second generation Cunninghamia lanceolata stands in Kaihua County, Zhejiang Province, were investigated. Soil organic carbon, dissolved organic carbon, microbial biomass carbon and soil enzyme were collected and analyzed. The main results were as follows: (1) there was no significant difference in the height growth of five Chinese fir clones between the same generations, and the second generation cultivation significantly slowed down the growth of F13 脳 Na-1C. The increment of DBH of KT13 'and B44' clones was P0.05, which decreased the biomass carbon storage and annual carbon sequestration of 5 Chinese fir clones. Except for clone K13', the biomass carbon of the second generation of the other four clones was significantly lower than that of P0.05. The annual carbon sequestration of Chinese fir was obviously slowed down by the second generation cultivation, and the average carbon sequestration decreased 30.40%, in which the decrease of K13 'was the least, and the decrease was only 13.30.3.The soil available phosphorus, soil microbial biomass carbon and soil sucrose enzyme were decreased in the second generation cultivated Chinese fir woodland. The regression equation between biomass carbon of Cunninghamia lanceolata and 13 soil quality factors was: 1 1.51X_3 0.36X_6 7.35X_7 0.09X_9 95.87X1 1.51X_3 0.36X_6 7.35X_7 0.09X_9 95.87X1 1.51X_3 0.36X_6 7.35X_7 0.09X_9. The biomass carbon of Chinese fir was positively correlated with soil available phosphorus, organic carbon, water-soluble organic nitrogen and catalase, but negatively correlated with soil pH, acid phosphatase and sucrase.
【學位授予單位】：浙江農(nóng)林大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：S791.27;S714.8

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