本文選題：紫花苜蓿 + 秋眠級　； 參考：《中國農(nóng)業(yè)科學(xué)院》2016年博士論文

【摘要】：從2013-2015年,在寧夏3個區(qū)域以13個不同秋眠級的紫花苜蓿品種作為供試材料。從苜蓿品種的生產(chǎn)性能、營養(yǎng)品質(zhì)、抗寒性和越冬率等多個方面研究不同秋眠級苜蓿品種對不同刈割處理的響應(yīng),研究結(jié)果如下:1.不同刈割體制(刈割頻度)下,同一苜蓿品種在同一區(qū)域的再生速度無顯著差異,而再生強(qiáng)度、株高、單株干重存在顯著差異,干草產(chǎn)量和營養(yǎng)品質(zhì)存在極顯著差異,表明新建刈割制度優(yōu)于傳統(tǒng)刈割制度。2.相同刈割體制下,(1)同一苜蓿品種在不同區(qū)域的產(chǎn)量因子和營養(yǎng)指標(biāo)差異極顯著,吳忠鹽池彭陽。說明同一苜蓿品種在引黃灌區(qū)(吳忠)的生產(chǎn)性能優(yōu)于揚(yáng)黃灌區(qū)(鹽池),更優(yōu)于雨養(yǎng)農(nóng)業(yè)區(qū)(彭陽);揚(yáng)黃灌區(qū)苜蓿品種的生產(chǎn)性能優(yōu)于雨養(yǎng)農(nóng)業(yè)區(qū),在雨養(yǎng)農(nóng)業(yè)區(qū)的表現(xiàn)最差。(2)不同秋眠級苜蓿品種在同一區(qū)域的再生強(qiáng)度、株高、單株干重和干草產(chǎn)量存在顯著差異,但其干鮮比、莖葉比、粗蛋白、NDF、ADF和RFV等營養(yǎng)指標(biāo)均無顯著差異。表明在同一區(qū)域苜蓿品種的品質(zhì)與其秋眠等級沒有相關(guān)性。但,品種的選擇會極大地影響其產(chǎn)量因子和草產(chǎn)量。3.相同秋季刈割處理下,(1)同一苜蓿品種在寧夏不同區(qū)域的株高、莖粗、分枝數(shù)、單株鮮重和干草產(chǎn)量均存在極顯著差異(P0.01),三地排序是吳忠鹽池彭陽,且隨著秋眠級的增加各項產(chǎn)量因子在三地的差異逐漸加大,其中株高吳忠比鹽池由1.10倍增至1.46倍,比彭陽由1.30倍增至1.87倍;單株鮮重吳忠比鹽池由1.07倍增至1.85倍,比彭陽由1.40倍增至2.86倍;干草產(chǎn)量吳忠比鹽池由1.12倍增至1.67倍,比彭陽由1.32倍增至2.11倍。(2)不同秋眠級苜蓿品種在同一區(qū)域的產(chǎn)量因子存在顯著差異,在吳忠的趨勢為WL363WL354≥WL343WL440WL319WL168,表明隨秋眠級的增加苜蓿品種的生產(chǎn)性能越大(WL440除外)。在鹽池的趨勢為W L343≥WL354WL319WL363WL440WL168,顯示秋眠級為3級和4級的苜蓿品種適宜在揚(yáng)黃灌區(qū)種植。在彭陽的趨勢為WL319WL168WL354≥WL343WL363WL440,顯示秋眠級為2級和3級的苜蓿品種適宜在雨養(yǎng)農(nóng)業(yè)區(qū)種植。4.不同秋季刈割處理下,同一區(qū)域同一苜蓿品種的生產(chǎn)性能存在顯著差異,在吳忠表現(xiàn)為秋季刈割時間越晚越好。在鹽池表現(xiàn)為中秋時節(jié)刈割最后一次為宜。在彭陽表現(xiàn)為9月初進(jìn)行最后一次刈割。5.在寧夏3個區(qū)域,苜蓿越冬率與其根部干物質(zhì)、棉籽糖、精氨酸和氨基酸總量呈極顯著正相關(guān)(相關(guān)系數(shù)在0.87-0.96之間);與蔗糖、可溶性糖、精氨酸、可溶性蛋白和全氮呈顯著正相關(guān)(相關(guān)系數(shù)在0.75-0.83之間)。但,苜蓿越冬率與淀粉含量呈極顯著負(fù)相關(guān),三地相關(guān)系數(shù)分別為-0.93、-0.88和-0.86。另外,苜蓿越冬率與其根部水蘇糖和天冬氨酸的含量不存在顯著相關(guān)。6.研究顯示,寧夏引黃灌區(qū)相同刈割制度,不同土壤類型和質(zhì)地的兩個地區(qū),種植同一紫花苜蓿品種其株高、分枝數(shù)、莖葉比、干鮮比、粗蛋白、NDF、ADF等產(chǎn)量因子和營養(yǎng)因子均存在顯著差異,干草產(chǎn)量存在極顯著差異。表明在灌淤土和壤土中種植紫花苜蓿的經(jīng)濟(jì)效益更高。
[Abstract]:From 2013-2015 years, 13 alfalfa varieties with different fall dormancy grade were used as the test materials in 3 regions of Ningxia. The response of different fall dormant alfalfa varieties to different mowing treatments was studied from various aspects of the production performance, nutritional quality, cold resistance and Overwintering Rate of alfalfa varieties. The results were as follows: 1. different mowing systems (mowing frequency), There was no significant difference in the rate of regeneration of the same alfalfa variety in the same area, but there was significant difference in regeneration intensity, plant height and single plant dry weight. There were significant differences in hay yield and nutritional quality. It showed that the new cutting system was better than the traditional cutting system.2. the same cutting system, (1) the yield factors and battalions of the same alfalfa variety in different regions. The difference of the breeding indexes was very significant, Wu Zhong Yanchi Pengyang. It showed that the production performance of the same alfalfa variety in the Yellow River irrigated area (Wu Zhong) was better than the yellowish irrigation area (salt pond), better than the rain fed agricultural region (Pengyang); the production performance of the alfalfa varieties in the yellowish irrigated area was superior to the rain fed agricultural area, and the worst in the rainfed agricultural area. (2) the different autumn dormant alfalfa varieties were in the same way. There were significant differences in regeneration intensity, plant height, plant dry weight and hay yield, but there was no significant difference in dry fresh ratio, stem leaf ratio, crude protein, NDF, ADF and RFV, indicating that the quality of Alfalfa Varieties in the same region had no correlation with their fall dormancy grade. Under the same autumn cutting treatment, (1) the plant height of the same alfalfa varieties in different regions of Ningxia, the stem diameter, the number of branches, the fresh weight of the single plant and the yield of hay were significantly different (P0.01). The three place was the Wu Zhong salt pond, and the difference of the yield factors in the three areas increased with the increase of the autumn dormancy grade, of which, the plant height Wu Zhong was more than the salt pond. It multiplied from 1.10 to 1.87 times from 1.30 to 1.46 times from 1.30 to Pengyang, and the single plant fresh weight Wuzhong was multiplied from 1.07 to 1.85 times, more than 2.86 times from 1.40 to Pengyang, and hay yield was doubled from 1.12 to 1.67 times, and from 1.32 to 2.11 times from Pengyang. (2) the yield factors of different autumn dormant alfalfa varieties were significant in the same area. The difference in Wu Zhong's trend is WL363WL354 > WL343WL440WL319WL168, indicating that the increase of Alfalfa Varieties with autumn dormancy is greater (except WL440). The trend of the salt pool is W L343 > WL354WL319WL363WL440WL168, which shows that the alfalfa varieties of 3 and 4 stages are suitable for planting in the yellowish irrigated area. The trend in Pengyang is WL319WL168WL35 4 or more WL343WL363WL440, it showed that the alfalfa varieties with grade 2 and 3 were suitable for planting.4. in the rainfed agricultural area, and there were significant differences in the production performance of the same alfalfa variety in the same region. In Wu Zhong, the later the better the harvest time was, the last time to mowing in the salt pond was the Mid Autumn Festival. The positive correlation of the Overwintering Rate of Alfalfa in 3 regions of Ningxia in the 3 regions of Ningxia at the beginning of the September was significant positive correlation with the root dry matter, the amount of cottonseed sugar, arginine and amino acids (the correlation coefficient was between 0.87-0.96), and was significantly correlated with sucrose, soluble sugar, arginine, soluble protein and total nitrogen (the correlation coefficient was in 0.75-0.83. However, the Overwintering Rate of Alfalfa had a very significant negative correlation with the starch content, and the three correlation coefficients were -0.93, -0.88 and -0.86., and there was no significant correlation between the Overwintering Rate of alfalfa and the content of the roots of stachyose and aspartic acid, which showed that the same mowing system, two regions of different soil types and textures in the Ningxia Yellow River irrigation area were planted. The plant height, branch number, stem leaf ratio, dry and fresh ratio, crude protein, NDF, ADF and other yield factors and nutrient factors of the same alfalfa varieties were significantly different, and there were significant differences in hay yield. It showed that the economic benefit of planting alfalfa in silt soil and loam soil was higher.
【學(xué)位授予單位】：中國農(nóng)業(yè)科學(xué)院
【學(xué)位級別】：博士
【學(xué)位授予年份】：2016
【分類號】：S541.9

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