5种饲草的分级指数测定与评价

成立新; 杨瑞杰; 格根图; 孙 林; 付俊平; 贾玉山

5种饲草的分级指数测定与评价

摘要: 本研究通过测定草原2号杂花苜蓿（Medicago varia cv.caoyuan No.2）、沙打旺（Astragalus adsurgens）、黑麦草（Lolium perenne）、高丹草（Sorghum vulgareS.sudanese）和狼尾草（Pennisetum alopecuroides）5种饲草的常规营养成分、体外消化率、总能值及自由采食量等指标，以中性洗涤纤维（NDF）、酸性洗涤纤维（ADF）和酸性洗涤木质素（ADL）为不同纤维素指标计算得出5种饲草的分级指数（Grading Index，GI）。经对比分析后认为，以ADL为纤维素指标计算得出的饲草分级指数最符合实际饲养中的饲草价值。按此指数评价的5种饲草品质优劣顺序为苜蓿沙打旺黑麦草高丹草狼尾草。

关键词:

分级指数（GI）；饲草品质；代谢能；干物质自由采食量

English

Measurement and evaluation of grading indexes (GI) of five forages

Publish Date: 2013-08-14

Abstract: The study was made by calculating the Grading Index (GI) of five kinds of forage grasses with their neutral washing fiber (NDF), acid washing fiber (ADF) and acid washing lignin (ADL) as different cellulose index to determine the conventional nutrient components , the in vitro digestion rate, gross energy, and dry matter intake. Comparing and analyzing GI calculation, the results showed that the grading index calculated by ADL as cellulose index was more reasonable, and also conformed to the actual feeding conditions. And the preferential order was alfalfaerect milkvetchryegrasssorghum Hybrid sudan grassChinese pennisetum.

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5种饲草的分级指数测定与评价

English

Measurement and evaluation of grading indexes (GI) of five forages

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