播期对冀东地区冰草生长和营养品质的影响

Effects of Sowing Date on the Growth and Nutritional Quality of Agropyron Gaertn.in Eastern Hebei Province

为了确定冀东地区秋季播种时期对冰草生长和营养品质的影响,以冰草新品系AZ1513为试验材料,于2020年秋季在河北科技师范学院实验站设置6个播期(10月6日,10月13日,10月20日,10月27日,11月3日,11月9日)进行播种,第二年对冰草的农艺性状(分蘖、株高、产量)与营养品质(粗蛋白CP,粗脂肪EE,粗灰分ASH,中性洗涤纤维NDF和酸性洗涤纤维ADF)等指标运用方差分析和灰色关联分析进行综合评价。不同播种时期对冰草的农艺性状以及营养品质均有显著影响;不同播期下,第2播期植株的分蘖数、株高、干草产量和种子产量最高;播期的延后会减少CP和EE的积累,同时ASH质量分数增加,播期延后还会增加NDF和ADF的质量分数。灰色关联分析结果显示,从3个生育时期的关联度和加权关联度排名来看,第4播期表现最好,其余依次是第3播期、第2播期、第6播期、第1播期,第5播期表现较差。10月中下旬在冀东地区播种冰草的产量和营养品质最优。

New Agropyron Gaertn.variety AZ1513 was sowed on October 6th,October 13th,October 20th,October 27th,November 3rd,and November 9th at the farm of Hebei Normal University of Science&Technology in the autumn of 2020,and the agronomic traits(number of tillers,plant height and yield)and nutritional quality(crude protein,crude fat,crude ash,neutral and acid detergent fiber content)of Agropyron Gaertn.were comprehensively evaluated in 2021 with analysis of variance and grey correlation analysis to determine the effects of sowing date during autumn on the growth and nutritional quality of Agropyron Gaertn.in eastern Hebei province.The result showed that sowing date had a significant impact on the agronomic traits and nutritional quality of Agropyron Gaertn.The tiller number,plant height,dry hay yield and seed yield of the plant sowed on October 13th were the best.The delay of sowing date reduced the accumulation of crude protein and crude fat,and increased the content of ash,neutral detergent fiber and acid detergent fiber.The grey correlation analysis showed that the correlation and weighted correlation of the fourth sowing date were the best,followed by the third sowing date,the second sowing date,the sixth sowing date,the first sowing date,and the fifth sowing date.The yield and nutritional quality of Agropyron Gaertn.sowed in the middle or late October in eastern Hebei province were the best.