本文關(guān)鍵詞：泡桐裝飾材優(yōu)良品系選育研究　出處：《中國林業(yè)科學(xué)研究院》2016年博士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 泡桐 裝飾材 無性系 材色 材性

【摘要】：泡桐原產(chǎn)我國,是我國著名的速生樹種之一。從上世紀(jì)70年代開始,我國主要面向黃淮海平原等傳統(tǒng)栽培區(qū)選育出30多個(gè)泡桐優(yōu)良品系應(yīng)用于生產(chǎn)。近年來,隨著泡桐板材價(jià)格的上漲,泡桐的栽培不僅在傳統(tǒng)主栽區(qū)穩(wěn)步發(fā)展,而且開始向長(zhǎng)江中下游地山丘陵區(qū)迅速擴(kuò)張。但是到目前為止,針對(duì)長(zhǎng)江中下游低山丘陵區(qū)的泡桐優(yōu)良品種選育工作一直沒有開展�；诖�,本文以18個(gè)5年生泡桐無性系為材料,對(duì)泡桐的材色性狀(明度、白度、變紅度、變黃度、總色差)、生長(zhǎng)性狀(胸徑、主干高、2.6m徑、主干材積、主干削度)、木材材性(密度、硬度、弦面抗劈力強(qiáng)度和徑面抗劈力強(qiáng)度)、木材中的糖類、酚類物質(zhì)含量以及N、K、P元素含量進(jìn)行了較為系統(tǒng)的研究,并對(duì)18個(gè)無性系進(jìn)行了綜合評(píng)價(jià),選出3個(gè)適合做裝飾材的優(yōu)良無性系。取得的主要結(jié)果如下:1、泡桐不同無性系的明度、白度、變紅度、變黃度、總色差均存在極顯著差異,具有較大的選擇空間;同時(shí),各無性系性狀間的變異系數(shù)較大,提供了優(yōu)選空間。糖類和酚類物質(zhì)含量的總體差異均達(dá)到極顯著水平,發(fā)現(xiàn)糖類和酚類物質(zhì)含量和明度、總色差呈極顯著相關(guān)。18個(gè)泡桐無性系的材色可分為三大類,其中第二類的9501、30A、10B、P6、P5、3A、3B共7個(gè)無性系具有明度和白度最大,變紅度、變黃度、總色差最小的特點(diǎn),屬于材色較好的一類無性系。2、泡桐不同無性系明度和白度隨樹高的變化趨勢(shì)一致,均是“低—高—低”型,即隨著樹干高度的增加,明度和白度先上升然后又下降。變黃度和總色差的變化趨勢(shì)是“高—低—高”型,即隨著樹干高度的增加先下降然后又升高。變紅度的變化趨勢(shì)是“直線”型,即隨著樹干高度的增加變紅度基本不變。3、泡桐不同無性系的胸徑、2.6m徑、主干削度差異顯著,而主干高和主干材積差異不明顯。泡桐無性系木材內(nèi)全N、全P含量差異顯著,而全K含量差異不明顯;全N含量與主干高、主干材積有極顯著的相關(guān)關(guān)系,全P含量與胸徑、2.6m徑、主干材積有極顯著的相關(guān)關(guān)系,全K含量與胸徑、主干高有極顯著的相關(guān)關(guān)系;很明顯速生的泡桐對(duì)N、P、K的需求是非常高的�；谏L(zhǎng)指標(biāo),18個(gè)泡桐無性系可分為三大類,其中第二類包括30A、4B、P2、5號(hào)等4個(gè)無性系,除了主干削度較大外,均具有樹干粗、主干高、材積大的特點(diǎn),屬于最為速生的一類無性系。4、泡桐不同無性系的密度、硬度、弦面抗劈力強(qiáng)度和徑面抗劈力強(qiáng)度均達(dá)到極顯著差異水平,同時(shí)各無性系性狀的變異系數(shù)較大,具有較大的選擇空間�；诓男灾笜�(biāo),18個(gè)泡桐無性系可分為三大類,其中第三類的46號(hào)、P2、52號(hào)、4B等4個(gè)無性系的密度、硬度、弦面抗劈力強(qiáng)度和徑面抗劈力強(qiáng)度平均值分別達(dá)到0.2724g/cm3、1590N、15.046N/mm、14.013N/mm,在三類無性系中均為最大,屬于材性較好的一類無性系。5、泡桐不同無性系木材密度和硬度隨樹高的變化趨勢(shì)是“低—高”型,即隨著樹干高度的增加密度和硬度逐漸變大,而弦面和徑面抗劈力強(qiáng)度卻正好相反,是“高—低”型,即隨著樹干高度的增加弦面、徑面抗劈力強(qiáng)度逐漸降低。6、不同無性系木材材色指標(biāo)、生長(zhǎng)指標(biāo)和材性指標(biāo)綜合評(píng)價(jià)顯示,18個(gè)泡桐無性系可分為5類,第一類為9501、4B、52號(hào)無性系,第二類為46號(hào)和P2無性系,第三類為2B、P5無性系,第四類為10B、5號(hào)、30A、3B、P3、3A和16號(hào)無性系,第五類為56號(hào)、P6、13號(hào)和16A無性系。第一類無性系變紅度、密度、主干削度、弦面抗劈力強(qiáng)度和徑面抗劈力強(qiáng)度在五類無性系中均排第一,變黃度、總色差和白度排第二,明度和硬度排第三,胸徑和主干材積排第四,主干高和2.6m徑排第五,在五類無性系中屬于指標(biāo)較好的一類無性系。因此9501、4B、52號(hào)3個(gè)無性系適于作為裝飾材。
[Abstract]:Paulownia originating in China, China is one of the famous fast-growing species. From the beginning of the last century in China in 70s, mainly for the traditional cultivation area of Huanghuaihai Plain bred more than 30 paulownia clones used in production. In recent years, with the rising price of Paulownia lumber, Paulownia cultivation not only in the traditional main planting area steadily the development, and began to expand rapidly to the hilly area of Yangtze River downstream. But so far, fine varieties breeding of Paulownia in hilly area of the middle and lower Yangtze River has not been carried out. Based on this, the 18 5 year old paulownia clones of paulownia wood color traits (brightness, white of red, yellow, color), growth traits (height, trunk height, 2.6m diameter, stem volume, stem taper), wood properties (density, hardness, tangential cleavage resistance strength and radial cleavage resistance), wood sugars, phenols containing And the amount of N, K, P element content was studied, and 18 clones were evaluated, selected 3 suitable for decoration material clones. The main results are as follows: 1 different clones of Paulownia tea, white, red, and yellow. The total color difference, there were significant differences, with a greater choice of space; at the same time, the somaclonal variation coefficients among traits is larger, providing optimal space. The overall difference of sugars and phenols content reached significant level, and found that the sugar content of phenolics and lightness, the total color difference was significantly related to.18 paulownia clones of wood color can be divided into three categories, including second types of 9501,30A, 10B, P6, P5,3A, 3B a total of 7 clones with maximum brightness and whiteness, red, yellow, color of the smallest, which belongs to a kind of clone.2 good wood color. Paulownia clones in Ming Dynasty With the tree height and whiteness of the same trend, are "low high low", namely with the increase of tree height, brightness and whiteness increases first and then decreases. The change trend of yellowing degree and total color difference is "high low high", namely with tree height the increase decreased then increased. Change trend of "red line", namely with the increase of tree height became roughly unchanged.3, DBH, different clones of Paulownia 2.6m trunk diameter, taper and high significant difference, while main trunk volume was not significantly different. In the N Department of wood Paulownia asexual, differences of total P content significantly, and the difference of total K content was not obvious; the content of N and the main high, there was a significant correlation between trunk volume, total P content and diameter, 2.6m diameter, there was a significant correlation between trunk volume, total K content and diameter, there was a significant correlation between the main high the speed is obvious; 鐢熺殑娉℃瀵筃,P,K鐨勯渶姹傛槸闈炲父楂樼殑.鍩轟簬鐢熼暱鎸囨爣,18涓場(chǎng)妗愭棤鎬х郴鍙垎涓轟笁澶х被,鍏朵腑絎簩綾誨寘鎷，

本文編號(hào)：1403664