【摘要】：為研究短花針茅荒漠草原主要植物種群及群落特征對(duì)施肥的響應(yīng),以蘇尼特右旗短花針茅荒漠草原為對(duì)象,運(yùn)用L16(45)正交試驗(yàn)設(shè)計(jì),施用氮肥(尿素,A1、A2、A3 和 A4 分別代表 0、75、150、225kg/hm~2),磷肥(磷酸二銨,B1、B2、B3 和 B4分別代表0、112.5、225、337.5kg/hm~2)和有機(jī)肥(C1、C2、C3和C4分別代表0、1500、3000、4500kg/hm~2),采用直觀分析、最優(yōu)母序列關(guān)聯(lián)和全信息模型對(duì)取樣數(shù)據(jù)進(jìn)行分析,得到如下結(jié)論。(1)主要植物種群高度、蓋度、密度和重要值受施肥影響表現(xiàn)復(fù)雜,不同植物種群表現(xiàn)不一致。綜合結(jié)果顯示,短花針茅受肥料影響,數(shù)量特征整體表現(xiàn)為下降趨勢(shì);無(wú)芒隱子草和堿韭受施肥處理的影響,數(shù)量特征整體表現(xiàn)為增加趨勢(shì)。(2)在施肥正交試驗(yàn)中,短花針茅前兩個(gè)較優(yōu)處理組合為A1B1C1和A2B1C2,無(wú)芒隱子草前兩個(gè)較優(yōu)處理組合為A4B2C3和A3B2C4,堿韭前兩個(gè)較優(yōu)處理組合為 A4B3C2 和 A1B3C3。(3)施肥對(duì)群落生物量較對(duì)照存在或高或低的處理,其中生物量表現(xiàn)較高的處理組合為A4B2C3和A4B3C2。(4)施肥能夠增加群落整體多樣性,但對(duì)單一多樣性指數(shù)影響比較復(fù)雜,群落整體多樣性較高的處理組合為A4B2C3和A4B3C2。(5)根據(jù)主要植物種群、群落生物量及群落多樣性綜合考慮,最優(yōu)的處理組合為A4B2C3,通過(guò)施肥處理可以控制植物種群的數(shù)量特征,從而達(dá)到群落物種控制作用。
[Abstract]:In order to study the responses of main plant populations and community characteristics to fertilization in Stipa breviflora desert steppe, a L16 (45) orthogonal design was used to apply nitrogen fertilizer (urea, A1A2) to the desert steppe of Stipa breviflora in Sunita's right flag. A3 and A4 stand for 0 75150225kg / hm-2), phosphate fertilizer (diammonium phosphate, B1OB2OB3 and B4 respectively for 0112.5225337.5kg/hm~2) and organic fertilizer (C1C2C2C3and C4 respectively for 01500003000kg / hm2), respectively. The results are as follows: (1) the height, coverage, density and important value of the main plant populations are affected by fertilization, and the performance of different plant populations is not consistent. The results showed that the quantity of Stipa breviflora was affected by fertilizer. Under the influence of fertilization, the quantitative characteristics of Cryptosporium amurensis and Leek were increased. (2) in the orthogonal fertilization experiment, the first two best treatments of Stipa breviflora were A1B1C1 and A2B _ 1C _ 2, and the results were as follows: (2) in the orthogonal fertilization experiment, the first two best treatments were A1B1C1 and A2B _ 1C _ 2. The first two optimal treatments were A4B2C3 and A3B2C4, and the first two optimal treatments were A4B3C2 and A1B3C3. (3) fertilization had higher or lower biomass than the control. A4B2C3 and A4B3C2. (4) fertilization could increase the overall diversity of the community, but had a complex effect on the single diversity index. A4B2C3 and A4B3C2. (5) according to the comprehensive consideration of main plant population, community biomass and community diversity, the optimal treatment combination was A4B2C3, and the quantitative characteristics of plant population could be controlled by fertilization. In order to achieve the community species control role.
【學(xué)位授予單位】：內(nèi)蒙古農(nóng)業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：S812

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