播种量和播种期对甘肃省高寒牧区不同燕麦品种草产量的影响

以3个抗寒性较强的燕麦品种华岭444,青永久409和陇燕2号为材料,研究了播种量和播种期交互作用对甘肃高寒牧区燕麦生产性能的影响。结果表明:品种、播种量、播种期及其相互间的交互作用对燕麦的生产性能具有显著影响,不同燕麦品种的生育期有显著差异,播种量和播种期对3个燕麦品种的生育期均有不同程度影响;参试3个燕麦品种的株高差异较大,播种量和播种期,及其交互作用均对株高有显著影响,随着播种量增大,株高逐渐降低;品种与播种量的交互作用对干草产量影响不显著,而品种、播种量、播种期、品种(播种期、播种量×播种期、品种×播种量×播种期)对燕麦干草产量均有显著影响。选择适宜品种为青永久409燕麦,进行合理密植(225kg/hm2)和适时播种(5月10日),是获得较高草产量的关键。

Effects of seeding rate and sowing date on productivity of different oat cultivars in alpine pastoral area in Gansu

The effect of the seeding rate and sowing date on productivity of three oat cultivars (Avena sativa cv.Hualin No.444,A.sativa cv.Qingyongjiu No.409 and A.sativa cv.Longyan No.2)was studied in alpine pastoral area in Gansu.The results showed that the cultivars,seeding rates,sowing dates and their interactions had significant effects on plant height and hay yield.The growth period of 3 cultivars were significantly dif-ferennt.The plant height of 3 cultivars was obviously different under different seeding rates,sowing dates and their interactions.With the increasing of seeding rate,the averaged plant height was decreased.The effect of in-teraction between cultivar and seeding rate on hay yield was not significant,but the cultivars,seeding rates,so-wing dates,varieties′sowing date,seeding rate′sowing date and varieties′seeding rate′sowing date showed obvious impact on forage yield.The highest froage yield could be obtained with suitable cultivar (Qingyongjiu No.409)at proper seeding rate (225 kg/hm2 )and sowing tiem (May 10).