蕨麻生长发育过程中对土壤养分的需求规律

将不同地区的蕨麻在西宁驯化栽培，通过对其生育期的观察以及对蕨麻种植地耕层土壤N、P、K、有机质养分变化情况的测定，得出：不同地区的蕨麻其各生育期的持续时问不同，造成了不同的吸肥要求．蕨麻对土壤有机质的需求在整个生长季节不大，且不同生态地区的蕨麻间无显著差异；蕨麻对土壤速效氮的吸收主要在匍匐期和花果期，大通蕨麻对速效氮的消耗量最大，其次是门源、刚察；土壤速效磷主要在基株生长期和块根膨大期被吸收，土壤速效磷消耗量从大到小依次为门源、大通、刚察；土壤速效钾也主要在基株生长期和块根膨大期被吸收，消耗量从大到小依次为刚察、门源、大通．

Consumption for soil nourishment during potentilla anserine growth

Growing period of potentilla anserine in different area were observed,and consumption of soil nourishment of area of planting potentilla anserine was determined during it growing.The result showed: the different of period of duration of potentilla anserineled result in the different consumption of soil nourishment.Consumption of organic materials was low for pote tilla anserine in different area and it was not remarkable difference among them.Rapidly available nitrogen fertilizer was absorbed duringcreeping period and anthesis.consumption of rapidly available nitrogen fertilizer was the highest of Da Tong potentilla anserine.Rapidly available phosphorus and rapidly available potassium were absorbed during extending period and tuberous expanding period.Consumption of rapidly available phosphorus was the highest of Men Yuan potentilla anserine.Consumption of rapidly available potassium manure was the highest of Gang Cha potentilla anserine.