本文關(guān)鍵詞： 毛竹 生物量 竹筍 海拔 密度 土壤理化性質(zhì)　出處：《安徽農(nóng)業(yè)大學(xué)》2014年碩士論文　論文類型：學(xué)位論文

【摘要】：本文對皖南毛竹(phyllostachys edulis地上生物量以及竹筍生長特性在不同環(huán)境因素影響下的變化情況進(jìn)行了研究,旨在為皖南毛竹生長發(fā)育和經(jīng)營管理提供一定的理論指導(dǎo)。主要結(jié)論如下：(1)毛竹地上器官平均含水率排序?yàn)橹袢~(54.52%)竹稈(43.36%)竹枝(34.95%)；器官含水率具有隨著年齡的加大而減小的趨勢：不同年齡的毛竹竹葉生物量變異性較大,枝條和稈的生物量變異性較��；竹稈所占地上生物量比例最大,其次是竹枝,最小的是竹葉；皖南毛竹最優(yōu)的異速生長關(guān)系模型為：lg w=a'+b 1g D+c 1g H。(2)不同海拔梯度下毛竹地上生物量存在顯著的差異性,隨著海拔的增加而呈現(xiàn)先“拋物線”型變化,H3海拔處毛竹地上生物量最大。隨著密度的增加毛竹地上生物量逐漸加大。土壤化學(xué)性質(zhì)中全P含量與毛竹地上生物量呈顯著地正相關(guān)關(guān)系,其它化學(xué)性質(zhì)與毛竹地上生物量之間關(guān)系效應(yīng)不明顯。(3)成竹數(shù)隨著海拔的升高呈現(xiàn)“拋物線”型變化趨勢,大小順序?yàn)镠3H2H1H4。皖南毛竹退筍率大小在40.47%～54.90%之間,且不同海拔區(qū)間退筍率差異不明顯。隨著海拔的升高皖南毛竹始發(fā)筍時間和出筍終止時間均向后推移,毛竹筍期持續(xù)天數(shù)隨著海拔的升高逐漸減少。同海拔區(qū)間出筍盛期時間無顯著差別,均為8天左右,毛竹出筍前期和出筍末期持續(xù)天數(shù)非常接近,均比出筍盛期時間長3-6天。皖南毛竹筍高生長期持續(xù)時間約為42～52天,并隨著海拔的升高而逐漸增加。不同海拔區(qū)間毛竹筍高生長均呈現(xiàn)“S”型變化。四個不同海拔區(qū)間反映竹筍高度(h)和生長時間(d)兩者關(guān)系最佳的曲線模型均為Logistic函數(shù)。筍地徑和成竹高受海拔的影響效應(yīng)較小。(4)皖南毛竹筍產(chǎn)量隨著密度的增加呈現(xiàn)“拋物線”型變化趨勢,產(chǎn)量最大值出現(xiàn)在4000株/hm2～4500株/hm2密度區(qū)間。隨著密度的增加筍期持續(xù)時間和竹筍高生長持續(xù)時間逐漸增加,竹筍平均日生長量和最大日平均生長量均隨密度的加大逐漸減小。竹筍地徑與密度之間存在顯著的負(fù)相關(guān)關(guān)系,但竹林密度對成竹高度的影響效應(yīng)不顯著。(5)皖南毛竹筍成竹數(shù)和成竹高度受土壤中各元素含量以及相關(guān)化學(xué)性質(zhì)的影響效應(yīng)較小。土壤中速效P含量與筍地徑間存在顯著的正相關(guān)關(guān)系,P0.01,關(guān)系較密切,其它土壤化學(xué)性質(zhì)對筍地徑的影響效應(yīng)較小。
[Abstract]:The aboveground biomass of phyllostachys edulis and the variation of bamboo shoot growth characteristics under different environmental factors were studied in this paper. The main conclusions are as follows: 1) the average moisture content of the aboveground organs of Phyllostachys pubescens is ranked as 54.52) the bamboo stem is 43.36) and the bamboo branch is 34.9595%; the moisture content of the organs increases with the age of the bamboo organs. The main conclusions are as follows: 1) the average moisture content of the aboveground organs of Phyllostachys pubescens is in the order of 54.52). But the decreasing trend: the biomass variability of bamboo leaves in different ages was higher, The biomass variability of branches and culms was small, and the percentage of aboveground biomass of bamboo culms was the largest, followed by bamboo branches, and the smallest was bamboo leaves. The optimal allometric growth relationship model of bamboo in southern Anhui Province was: 1 g wangya'b 1g D c 1g H.f2) there was significant difference in aboveground biomass of Phyllostachys pubescens under different altitude gradients. The aboveground biomass of Phyllostachys pubescens increased with the increase of density, and the total P content in soil chemistry and the aboveground biomass of Phyllostachys pubescens were increased with the increase of altitude. There was a significant positive correlation between the quantity and the quantity. The relationship between other chemical properties and aboveground biomass of Phyllostachys pubescens was not obvious. With the increase of altitude, the time of bamboo shoot initiation and the end time of shoot shoot all moved backward, and there was no significant difference in the rate of bamboo shoot retrogression between different altitude regions, with the increase of altitude, the time of bamboo shoot beginning and ending. The days of bamboo shoot duration decreased gradually with the increase of altitude, but there was no significant difference between the periods of shoot emergence and peak at the same altitude, which were all about 8 days, and the days of early and late bamboo shoots were very close to each other. The duration of high growth period of bamboo shoots in southern Anhui Province was about 422 ~ 52 days, which was 3 ~ 6 days longer than that of bamboo shoots. With the increase of altitude, the height of Phyllostachys pubescens increased gradually. The growth of bamboo shoot height showed "S" type change at different altitudes. The best curve model of the relationship between the four different elevations reflected the height of bamboo shoot and the growth time was all Logistic's function. The effect of altitude on the diameter and height of bamboo shoot was small. (4) the bamboo shoot yield of southern Anhui showed a "parabola" pattern with the increase of density. The maximum yield appeared in the density range of 4000 plants / hm ~ 2 / hm ~ 2 / hm ~ 2 / hm ~ 2. With the increase of density, the duration of shoot period and the growth duration of bamboo shoot height increased gradually. The average daily growth of bamboo shoots and the maximum daily average growth of bamboo shoots gradually decreased with the increase of density, and there was a significant negative correlation between the diameter of bamboo shoots and the density of bamboo shoots. However, the effect of bamboo density on bamboo height is not significant. (5) the bamboo number and height of bamboo shoots in southern Anhui are less affected by the content of soil elements and the relative chemical properties. There was a significant positive correlation (P0.01), and the relationship was close. Other soil chemical properties have little effect on the diameter of bamboo shoot.
【學(xué)位授予單位】：安徽農(nóng)業(yè)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：S795.7

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本文編號：1539235