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作 者 ：童学军;李惠珍;曾焕泰;章文贤;严小龙;卢永根

期 刊 ：植物营养与肥料学报 2001年 7卷 3期 页码：298-304

关键词：大豆基因型；低磷胁迫；磷效率特性；

Keywords:soybean genotype, low phosphorus stress, phosphorus efficiency,

摘 要 ：采用无磷 (P0 )和低磷 (P1 )溶液培养方法 ,对 1 9份经田间和盆栽土培试验中磷效率特性表现不同的大豆基因型进行研究 ,探讨低磷溶液培养条件下大豆基因型生长和磷素营养特性及其与土培条件下磷效率特性的关系。结果表明 ,在低磷溶液培养下 ,不同大豆基因型吸收溶液中可溶性磷的能力存在差异 ,吸收的磷量可达到自身固有磷量的 5 %～ 80 %左右。土培条件下磷效率比值相对值较小 (即在酸性红壤耕地上适应性较好 )的基因型 ,在低磷溶液培养下 ,不同基因型吸收溶液中可溶性磷的能力有强有弱 ;而磷效率比值相对值较大 (即在酸性红壤耕地上适应性较差 )的基因型 ,亦有相似的表现。低磷处理的不同大豆基因型植株鲜重净增量为无磷处理的 17.79%～99.09% ,植株干重净增量为 15.64 %～11.6 67%。无磷处理的植株干、鲜生物量 ,地上部干、鲜量 ,磷效率比值和低磷处理的磷效率比值以及种子重与土培条件下大豆基因型磷效率比值相对值呈显著、极显著正相关。

Abstract:Growth and P nutrition of 19 soybean genotypes, characteristics of phosphorus efficiency of which were assessed using pot experiment and field test , were conducted by non phosphorus (P0, 0mg/kg) and low phosphorus(P1, 0 1mg/kg)hydroponics The correlation among characteristics of phosphorus efficiency in soil pots , characteristics of phosphorus nutrition in solution culture and some seed traits were also carried out The results are as follows:1) The ability of different soybean genotypes to accumulate soluble phosphorus from low phosphorus solution in hydroponics is different The amount of net plant phosphorus uptake is about 5%～80% of that of seed phosphorus content 2) The ability of utilizing soil phosphorus is different from that of utilizing soluble phosphorus in solution among some soybean genotypes 3) The amount of net plant fresh biomass is 17.79%～99.09% of that of plant fresh biomass in P0 solution culture;The amount of net plant dry biomass is 15.64%～116.67% of that of plant dry biomass in P0 solution culture 4) There are significantly or very significantly positive correlation between relative value plant phosphorus efficiency ratio of soybean genotypes under pot test and the values of seed weight; dry and fresh biomass of shoot or plant; and plant phosphorus efficiency ratio in P0 or P1 treatment

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