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本文调查了紫花苜蓿不同生育时期养分吸收以及各茬次苜蓿干草产量和营养物质的变化情况,结果表明,苜蓿植株在分枝初期至现蕾期生长最快,养分吸收量大,植株蛋白质积累速度快,现蕾至初花期干物质和蛋白质积累量达到最高,是最佳收获时期。苜蓿周年可以收获四茬,第一茬养分吸收量最大,产量最高,占全年产量的36.9%,蛋白质累积量占全年的36.5%,是影响苜蓿周年产量的关键时期。
In this paper, we investigated the nutrient uptake of alfalfa at different growth stages and the changes of hay yield and nutrient content of alfalfa at different growth stages. The results showed that the alfalfa plants grew fastest during the initial stage of branching to budding stage, with large nutrient uptake and plant protein accumulation rate Fast, budding to early flowering dry matter and protein accumulation reached the highest, is the best harvest time. Alfalfa can harvest the fourth anniversary of the anniversary, the first crop nutrient uptake, the highest yield, accounting for 36.9% of the annual output, protein accumulation accounted for 36.5% of the year, is the annual yield of alfalfa critical period.