本文關(guān)鍵詞：施肥對(duì)巨桉幼樹生長及生物固碳量的影響，由筆耕文化傳播整理發(fā)布。

施肥對(duì)巨桉幼樹生長及生物固碳量的影響

Growth and biomass carbon sequestration of young Eucalyptus grandis with fertilization

[1] [2] [3] [4] [5] [6]

WANG Dong,GONG Wei,HU Ting-xing,CHEN Hong-zhi,WANG Jing-yan,LI Xiao-ping（1.Sichuan Provincial Key Laboratory of Ecological Forestry Engineering,Sichuan Agricultural University,Ya＇an 62

[1]四川農(nóng)業(yè)大學(xué)生態(tài)林業(yè)工程省級(jí)重點(diǎn)實(shí)驗(yàn)室,四川雅安625014; [2]四川省林業(yè)調(diào)查規(guī)劃院,四川成都610081

文章摘要：桉樹Eucalyptus作為世界三大速生樹種之一,廣泛用于營造人工林,其中巨桉Eucalyptus grandis以生長速度快和經(jīng)濟(jì)效益好而成為目前栽培面積最大的一種桉樹。以不施肥為對(duì)照,研究不同施肥水平（含氮、五氧化二磷和氧化鉀各15%的復(fù)合肥0,90,180,270 g·株-1）下巨桉的生長及生物固碳量。結(jié)果表明：施肥90～270 g·株-1與不施肥條件下相比,巨桉地徑、冠徑、樹高、整株生物量和根冠比分別增加16.3%～38.3%,17.1%～44.5%,15.8%～45.5%,21.8%～59.5%和2.1%～5.8%,且地徑、冠徑、整株生物量以及生物固碳量都顯著大于不施肥處理;施肥180 g·株-1的地徑和樹高與270 g·株-1和90 g·株-1差異均不顯著,但施肥270 g·株-1均顯著高于90 g·株-1,施肥90 g·株-1的樹高與不施肥處理間的差異不顯著;各施肥水平下的冠徑之間存在顯著性差異。地徑、冠徑和樹高生長速度與施肥量呈極顯著正相關(guān)關(guān)系（P〈0.01）,且在7月和8月的生長速度相對(duì)較快。除施肥270.株-1外,其他施肥處理的根冠比與不施肥處理差異不顯著,各施肥水平的整株生物量和生物固碳量之間均存在顯著性差異。說明在試驗(yàn)地條件下0～270 g·株-1肥料用量范圍內(nèi)增加施肥量有利于促進(jìn)巨桉生長,提高生物量和生物固碳量以及根冠比。這對(duì)巨桉林的科學(xué)施肥管理以及緩解全球氣候變化具有重要的作用。

Abstr：Eucalyptus is one of three fast growing tree types used widely in tree plantations,and Eucalyptus grandis has the largest cultivated area of all species because of its fast growth and favorable economic opportunities.To determine the effects of fertilization on growth and biomass carbon sequestration of E.grandis,a compound fertilizer containing 15% N,15% P2O5,and 15% K2O was applied with different treatments of（in g·stem-1） 0（ck）,90（Ⅰ）,180（Ⅱ）,and 270（Ⅲ）,and a correlation analysis was employed.Each treatment has three replicates and each was arranged in random blocks.The soil was a Purple soil with an average pH of 5.60,and contained soil organic matter 15.3 g·kg-1,total soil N 1.23 g·kg-1,available N 82.8 mg·kg-1,available P 51.38 mg·kg-1 and available K 61.45 mg·kg-1 prior to the start of the pot experiment.Results showed that compared to the control,fertilization treatments Ⅰ,Ⅱ,and Ⅲ significantly（One-way ANOVA Duncan Multiply Test） increased the stem base（P 0.05,16.3%-38.3%）,crown width（P0.05,17.1%-44.5%）,tree height（P0.05,15.8%-45.5%）,biomass（P0.05,21.8%-59.5%）,and root-shoot（R/S） ratio（P0.05,2.1%-5.8%）.For stem base and tree height,fertilized treatments Ⅲ were significant higher than Ⅰ,but no significant difference was observed between Ⅱ and Ⅲ or Ⅰ.Among fertilized treatments,crown width was significantly different（P0.05）.Growth of the stem base,crown width,and tree height were significantly and positively correlated with the amount of applied fertilizer（P0.01） and with growth faster in July and August than other months（June and September）.For R/S,Ⅲ was significantly greater than ck.Also,among different treatments,significant differences in biomass（P0.05） and biomass carbon sequestration（P0.05） were found.Thus,for scientific management and fo

文章關(guān)鍵詞：

Keyword：:forest ecology fertilization Eucalyptus grandis growth biomass carbon sequestration

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課題項(xiàng)目：“十一五”國家科學(xué)技術(shù)支撐計(jì)劃項(xiàng)目（2008BADC2B01）; 四川省教育廳資助項(xiàng)目（08zb038）

  本文關(guān)鍵詞：施肥對(duì)巨桉幼樹生長及生物固碳量的影響，由筆耕文化傳播整理發(fā)布。