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采用１５Ｎ示踪、氨基酸自动分析、消化酶等技术研究了以６０Ｃｏγ－射线引变选育的稻谷亩产达５４８．７ｋｇ的两用稻２０２的特性及秸秆（稻草）饲料价值，结果表明：１．２０２稻草中１５Ｎ回收率平均比ＣＫ高１３９．６％：２．２０２稻草粗蛋白质含量达７．９９％－１５．７５％，在不同环境条件下都比ＣＫ高，既能遗传又受环境条件影响；３．２０２营养生理上具有顶端优势较弱的特性，有利于粗蛋白质贮存在稻草中；４２０２具有把吸收Ｎ转化为氨基酸的能力较强的生化特性，稻草氨基酸含量比含Ｎ量相同的ＣＫ高８８．８％：５．２０２稻草粗蛋白质和氨基酸（总量）的消化率分别比ＣＫ高６．２４％和３．２０％；６．２０２稻草体外干物质消化率（ＮＤＭＤ）达５６．６％－６４．１％，接近山地牧草推广种宽叶雀稗；７．２０２稻草饲养奶牛比一般稻草产奶量提高７．３５％。
15N tracing, automatic amino acid analysis, digestive enzymes and other techniques were used to study the characteristics of the dual-purpose rice 202 with straw yield of 548.7kg and the straw (straw) feed value selected by 60Coγ-ray. The results showed that: 1 .202 The average 15N recovery of straw was 139.6% higher than that of CK: 2.202 The crude protein content of straw reached 7.99% -15.75%, which was higher than that of CK under different environmental conditions, 3.202 nutrition physiology has the top edge of the weaker features conducive to the storage of crude protein in the straw; 4202 has the ability to absorb N into amino acids strong biochemical properties of straw amino acid content than the same amount of N CK of 88.8%: 5.202 The digestibility of rice straw crude protein and amino acid (total amount) were 6.24% and 3.20% higher than that of CK respectively. 6.202 Rice straw dry matter digestibility (NDMD) 56.6% -64.1%, close to the mountain forage to promote broadleaf paspalum 7.202 7.35% increase straw feeding cows milk than the average straw.