西宁地区青藏扁蓿豆地上生物量观察研究

青藏扁蓿豆在西宁地区生长良好,但播种当年不能形成种子,返青至成熟约需≥10℃积温3 520.8℃,生育期约167d,生长第二年地上生物量鲜草可达18 661.8 kg/hm2,干草达4 911 kg/hm2,种子产量为487.43 kg/hm2,叶、细枝丰富,茎叶比为1∶0.77。

Observation and Study of Aboveground Biomass of Medicago archiducis-nicolai Sirj in Xining Area

Medicago archiducis-nicolai Sirj grew well in Xining area,but it did not form seeds in seeding year.When the accumulated temperatures above 10℃ was 3 520.8℃ from regrowth to mature,growth period was about 167 days,the fresh aboveground biomass was 18661.8kg/hm2 in the second year,hay yield was 4911 kg/hm2,the seed yield was 487.43 kg/hm2.It's leaves and branches were abundant,and the ratio of stems to leaves was 1∶0.77.