| 棉秆剪切力与营养成分含量之间的相关关系 |
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| 引用本文： | 冯昕炜,王林娜,安志扬,胡方,许贵善.棉秆剪切力与营养成分含量之间的相关关系[J].动物营养学报,2016(11):3585-3589. |
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| 作者姓名： | 冯昕炜 王林娜 安志扬 胡方 许贵善 |
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| 作者单位： | 1. 塔里木大学动物科学学院，阿拉尔 843300; 新疆生产建设兵团塔里木畜牧科技重点实验室，阿拉尔 843300;2. 塔里木大学动物科学学院,阿拉尔,843300 |
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| 基金项目： | 新疆生产建设兵团塔里木畜牧科技重点实验室开放课题重点项目(HS201301) |
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| 摘 要： | 本试验旨在研究棉秆剪切力与营养成分含量之间的相关关系。将棉秆按照近地面1/3(下1/3)、中部1/3(中1/3)和上部1/3(上1/3)切为3段,测定各段的质量和长度,计算线性密度;测定茎秆和侧茎的剪切力及主要营养成分的含量。结果表明:棉秆线性密度及直径由上至下逐渐升高,3段之间差异显著(P0.05);全株棉秆粗蛋白质含量为8.78%;中性洗涤纤维在茎秆下1/3含量(62.54%)最高,棉叶中含量(35.51%)最低;棉秆茎秆中粗蛋白质及粗灰分含量与剪切力间呈负相关关系(P0.001);干物质、中性洗涤纤维、酸性洗涤纤维及半纤维素含量与剪切力呈正相关关系(P0.001)。棉秆不同部位中,剪切力大小主要受其直径和营养成分含量的影响,棉秆的剪切力与营养成分含量之间具有较强的线性关系。
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| 关 键 词： | 棉秆 剪切力 营养特性 |
Correlations between Shearing Force and Nutrient Contents of Cotton Stem |
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| Abstract: | This experiment was conducted to study the correlations between shearing force and nutrient contents of cotton stem. Cotton stems were cut into three parts at 1/3 from bottom (bottom 1/3), 1/3 in the middle ( middle 1/3) and 1/3 from top ( top 1/3) , respectively. The mass and length of different parts were tested, and the linear density was calculated; the shearing force and main nutrient contents of stem and lateral branch were determined. The results showed as follows:the linear density and diameter increased from top to bottom, and the differences among three parts were significant ( P<0.05); crude protein content of whole cotton stem was 8.78%;neutral detergent fibre content in stem bottom 1/3 was the highest (62.54%), while that in cotton leaves was the lowest (35.51%); crude protein and ash contents had negative correlations with shearing force ( P<0.001); dry matter, neutral detergent fibre, acid detergent fibre and hemicellulose had positively correla?tions with shearing force ( P<0.001) . In conclusion, in different parts of cotton stem, shearing force is mainly affected by diameter and nutrient contents, and strong linear relationships exist between shearing force and nu?trient contents. |
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| Keywords: | cotton stem shearing force nutrition characteristic |
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