劉苗苗 尹小暢 嚴琳琳 張瑜 廖麗 白昌軍 王志勇
摘 要 對17份山螞蝗材料營養期的營養成分進行測定與分析。結果表明:(1)粗蛋白含量最高的為CIAT3787(D. hererocarpum)(22.34%),其次是CIAT46562(D. dunniinicaraguense)(22.32%);粗纖維含量最高的是CIAT13218(D. velutinum)(38.70%),顯著高于其他品系(p>0.05);(2)山螞蝗營養成分之間存在不同程度的相關性,粗纖維含量分別與粗灰分、無氮浸出物、磷的含量存在極顯著負相關,粗灰分含量與磷含量有極顯著正相關,與鈣含量有顯著相關;(3)通過聚類分析,在歐氏距離8.0處,可將17份供試山螞蝗材料劃分為3類,其中CIAT46562和CPI46561(D. incanum)單獨聚為一類。
關鍵詞 山螞蝗屬;營養期;營養成分;聚類分析
中圖分類號 S54 文獻標識碼 A
Analysis of Nutrient Components at Vegetative Stage
on Desmodium Desv.
LIU Miaomiao1,2, YIN Xiaochang1,2, YAN Linlin1, ZHANG Yu1,
LIAO Li2, BAI Changjun1 *, WANG Zhiyong2 *
1 Tropical Crops Genetic Resources Institute, CATAS/Key Laboratory of Crop Gene Resources and Germplasm Enhancement
in Southern China, Ministry of Agriculture, Danzhou, Hainan 571737, China
2 College of Agronomy, Hainan University, Haikou, Hainan 570228, China
Abstract The nutritional components of 17 Desmodium Desv. accessions were studied at vegetative stage. The results indicated that CIAT3787(D. hererocarpum)had the hightest CP(22.34%), and the next was CIAT46562 (D. dunniinicaraguense)(22.32%). CIAT 13218(D. velutinum)had the highest CF(38.70%), and significantly higher than other accessions. Nutritional components of Desmodium Desv. had different degree of correlation coefficient. CF with Ash, NFE and P had extremely significant(p<0.01)negative correlation. Ash with P had extremely significantly positive correlation(p<0.01), with Ca had significantly positive correlation(p<0.05). Based on nutritional components, the accessions were clustered into three groups. CIAT46562 and CPI46561(D. incanum)all solely were a group.
Key words Desmodium Desv.; Vegetative state; Nutritional components; Clustering analysis
doi 10.3969/j.issn.1000-2561.2015.01.021
我國是農業大國,畜牧業隨著經濟水平提高,發展迅速,牧草是農業和畜牧業的重要生產資料,20世紀90年代以來,在國家西部開發、退耕還草、退牧還草的政策支持下,我國牧草產業取得了較快的發展。牧草產業發展對于促進草食畜牧業發展、提高綠色GDP、改善生態環境、調整產業結構等方面都具有重要作用[1]。因此,引進篩選改良牧草品種,在新時期發展牧草產業具有重要戰略意義。豆科牧草因其粗蛋白含量高,在牧草產業中有著不可替代的作用。山螞蝗屬(Desmodium Desv.)是豆科蝶形花亞科山螞蝗族,一年或多年生草本或灌木植物,因其適應性強,抗性強,廣泛分布于熱帶和亞熱帶地區,全球約350種[2-5]。山螞蝗屬植物草產量較高,營養豐富,是熱帶亞熱帶地區極具潛力的高蛋白飼料來源。
牧草中的營養成分直接影響牲畜的產量和質量,是作為評定牧草質量的重要指標之一,國內外對牧草營養成分的研究成果豐富,尤其是對有“牧草之王”之稱的南方的柱花草和北方的苜蓿的研究深入。徐……