夏河农牧交错区小黑麦与豌豆混播比例对生产性能的影响

Forage yield and nutrient value in the mixture of triticale and legume in the farming-pastoral ecotone of Xiahe

【目的】筛选适合于夏河农牧交错区小黑麦与豌豆的混播组合及比例。【方法】本试验研究了3种豆科牧草(加拿大饲用豌豆、青海箭筈豌豆和绿箭1号箭筈豌豆)与甘农2号小黑麦不同混播比例(0∶100、20∶80、30∶70、40∶60、50∶50、60∶40、70∶30、80∶20、100∶0)下的生产性能及营养价值。【结果】从混播组合看,甘农2号小黑麦与加拿大饲用豌豆混播后不同混播比例的平均酸性洗涤纤维(ADF)含量最低(31.57%)、鲜草产量最高(48.14 t/hm^(2))、综合评价值(0.954)最高,小黑麦与绿箭1号箭筈豌豆混播时小黑麦的株高(137.00 cm)、豆科牧草的株高(121.78 cm)、粗脂肪(EE)含量(2.76%)最高;从混播比例看,3种豆科牧草与甘农2号小黑麦以30∶70的比例混播时,平均干草产量最高(13.76 t/hm^(2)),综合评价值(0.687)最高;混播组合和混播比例间的交互作用表明,青海箭筈豌豆与甘农2号小黑麦以30∶70的比例混播时干草产量较高(15.69 t/hm^(2)),综合评价值最高(0.706),以20∶80的比例混播时,干草产量最高(16.45 t/hm^(2)),综合评价值较高(0.633)。【结论】夏河农牧交错区青海箭筈豌豆与甘农2号小黑麦以30∶70或20∶80的比例混播时草产量和营养价值较好。

【Objective】To establish the optimum mixture model of triticale and legumes in the farming-pastoral ecotone of Xiahe.【Method】This research was conducted to study the production performance and nutrition quality of three kinds of legumes(Canadian forage peas,Qinghai common vetch and‘Lvjian No.1’)mixed with triticale variety‘Gannong No.2 at different ratios(0∶100,20∶80,30∶70,40∶60,50∶50,60∶40,70∶30,80∶20,100∶0),respectively.【Result】The combination of Gannong No.2 and Canadian forage peas,had the lowest average ADF content(31.57%)and highest comprehensive evaluation value(0.954).The triticale height(137.00 cm),legume forage height(121.78 cm)and EE content(2.76%)were the highest in the combination of Gannong No.2 and‘Lvjian No.1’vetch,.From the signal factor of mixed ratios,the three kinds of legumes mixed with Gannong No.2 at a ratio of 30∶70,both the average hay yield(13.7598 t/hm^(2))and the comprehensive evaluation value(0.687)were the highest.In contrary,from the interaction of mixture combination and ratios,Qinghai common vetch mixed with Gannong No.2,at a ratio of 30∶70,hay yield(15.69 t/hm^(2))was high and comprehensive evaluation value was the high-est(0.706)while at a ratio of 20∶80,the hay yield was the highest(16.45 t/hm^(2))and comprehensive evaluation value was high(0.633).【Conclusion】Therefore,in the farming-pastoral ecotone of Xiahe,the best mixture model was Qinghai common vetch mixed with Gannong No.2 at a ratio of 30∶70 or 20∶80.