甘南桑科高寒草原牧区牧草混播种植研究

Study on Different Forage Mix-sowing in Sangke Alpine Grassland in Gannan

试验开展了燕麦、绿麦和箭筈豌豆的单播、混播种植研究,对不同播种方式下不同生育期的产量和营养成分进行了对比。结果表明:从抽穗期到盛花期,单播和混播下的干草产量都显著增加(P<0.05),最高不同混播组合平均产量在盛花期达到10 038kg/hm^2;盛花期最高产量出现在燕麦单播、绿麦单播、燕麦和绿麦混播组合中;随着不同混播组合牧草生育期的推迟,中性洗涤纤维(NDF)和酸性洗涤纤维(ADF)含量显著增加(P<0.05),粗蛋白(CP)含量显著降低(P<0.05);粗蛋白含量最高的组合出现在燕麦与箭筈豌豆、绿麦与箭筈豌豆的混播组合中,在盛花期含量达到11.3%~11.7%。研究结果表明,混播模式相比单播模式显著提高了牧草CP的含量(P<0.05),显著降低了牧草NDF和ADF的含量(P<0.05)。

Oat, triticale and vetch were planted in monoculture or multiculture mode to determine the hay yield and nutritional status at different growing stages. The results showed that the hay yield of the monoculture and multiculture significantly increased with the proceeding of the growing stage （P〈0.05）. The highest mean forage yield in full flowering stage reached 10038 kg/hm2 in oat monoculture, Lolium peremme L monoculture and the mixed seeding of oat and Lolium peremme L. With the growing9 the NDF and ADF contents in different mixed sowing treatments significantly increased （P〈0.05）, but the CP contents decreased （P〈0.05）. The treatments of oat mixing with Vicia sativa L showed highest CP contents, up to 11.3-11.7 % in full flowering stage. The results indicate that the forage CP contents of the multi- culture were higher than that of monoculture （P〈0.05）, but the NDF and ADF contents were lower （P〈0. 05）.