不同时期喷施叶面肥对六个苜蓿品种再生草产量和品质的影响

Effects of spraying foliar fertilizer at different periods on the yields and quality of six varieties of regrowing alfalfa

为了观测叶面肥喷施时期对不同品种苜蓿增产效果、叶茎比及品质的影响,试验选择龙牧801(Medicago sativa cv.Longmu 801)、龙牧803(Medicago sativa cv.Longmu 803)、敖汉(Medicago sativa cv.Aohan)、驯鹿(Medicago sativa cv.Reindeer)、阿尔冈金(Medicago sativa cv.Algonquin)和金皇后(Medicago sativa cv.Golden-empress)六个苜蓿品种,分别在第二茬再生草的现蕾期、开花初期和开花中期喷施叶面肥[0.1%钼酸铵+0.2%硫酸亚铁+0.3%尿素+99.4%水],以未喷施作为对照,测定牧草产量和品质指标。结果表明:增产效果明显的分别是现蕾期的龙牧803、驯鹿和阿尔冈金,开花初期的金皇后,开花中期的龙牧801和敖汉苜蓿;茎叶比与同期对照相比增加明显的分别是现蕾期的龙牧801、龙牧803和阿尔冈金苜蓿,开花中期的敖汉、驯鹿和金皇后;粗蛋白含量增加明显的分别是现蕾期的龙牧801、敖汉苜蓿、阿尔冈金和金皇后及开花中期的龙牧803和驯鹿。说明龙牧801、龙牧803、敖汉、驯鹿、阿尔冈金和金皇后六个苜蓿品种二茬草分别在现蕾期、现蕾期、开花中期、开花中期、现蕾期和开花初期喷施叶面肥,可获得较高的产量和品质。

To observe the effect of spraying period of foliar fertilizer on the yield-increasing effects,stem-leaf ratio and quality of different varieties of alfalfa,six varieties of alfalfa were selected in the test,including Medicago sativa cv.Longmu 801,Medicago sativa cv.Longmu 803,Medicago sativa cv.Aohan,Medicago sativa cv.Reindeer,Medicago sativa cv.Algonquin and Medicago sativa cv.Golden-empress.The leaf fertilizer(0.1% molybdate plus 0.2% ferrous sulfate and 0.3% urea with 99.4% water] was sprayed at the budding stage,early flowering and mid-flowering stages of the second-stubble of six varieties of regrowing alfalfa to determine the forage yields and quality indicators,respectively,taking without spraying as a control.The results showed that the alfalfa varieties with obvious yield-increasing effects were the Medicago sativa cv.Longmu 803,Medicago sativa cv.Reindeer and Medicago sativa cv.Algonquin at budding stage,Medicago sativa cv.Golden-empress at early flowering stage,Medicago sativa cv.Longmu 801 and Medicago sativa cv.Aohan at mid-flowering stage; the alfalfa varieties with obviously increased stem-leaf ratio increased compared with the same period of the control were Medicago sativa cv.Longmu801,Medicago sativa cv.Longmu 803,and Medicago sativa cv.Algonquin at budding stage,Medicago sativa cv.Aohan,Medicago sativa cv.Reindeer and Medicago sativa cv.Golden-empress at mid-flowering stage; the alfalfa varieties with obviously increased crude protein content were Medicago sativa cv.Longmu 801,Medicago sativa cv.Aohan,Medicago sativa cv.Algonquin and Medicago sativa cv.Golden-empress at the budding stage,Medicago sativa cv Longmu 803 and Medicago sativa cv Reindeer at mid-flowering stage,respectively.The results indicate that the second-stubble of six alfalfa varieties including Medicago sativa cv.Longmu 801,Medicago sativa cv.Longmu 803,Medicago sativa cv.Aohan,Medicago sativa cv.Reindeer,Medicago sativa cv.Algonquin and Medicago sativa cv.Golden-empress are sprayed foliar fertilizer at budding stage,budding stage,mid-lowering stage,mid-lowering stage,budding stage and early flowering stage,respectively,which can obtain higher yields and quality.