Analysis of Phosphorus Nutrition Efficiency of Soybean Genotypes with Different Phosphorus Efficiency at Blooming Stage under Low Phosphorus Stress  

低磷胁迫下不同磷效率大豆花期磷营养效率分析(英文)

作　　者：张彦丽[1] 

机构地区：[1]牡丹江师范学院生命科学与技术学院,黑龙江牡丹江157011

出　　处：《Agricultural Science & Technology》2012年第12期2544-2548,共5页农业科学与技术（英文版）

基　　金：Supported by Doctoral Scientific Research Start-up Project of Mudanjiang Normal University(MSB200912);"12th Five-Year Plan" Educational Science and Research Project of Heilongjiang Association of Higher Education(HGJXHB1110053);Teaching Reform Project of Mudanjiang Normal University(10-XY01067)~~

摘　　要：[Objective] This study aimed to investigate the phosphorus nutrition effi- ciency of different soybean genotypes at blooming stage under low phosphorus stress. [Method] By using four ＂low phosphorus efficiency＂ soybean genotypes （D03, D05, D17 and D18） and four ＂high phosphorus efficiency＂ soybean genotypes （D31, D34, D37 and D38） as experimental materials, soil culture experiment was conduct- ed with two treatments of high phosphorus （＋P） and low phosphorus （-P）, to analyze the relationship between phosphorus content, phosphorus uptake, phosphorus use efficiency and phosphorus efficiency of soybean genotypes with different phos- phorus efficiency. [Result] Under low phosphorus conditions, four soybean genotypes with high phosphorus efficiency showed significant advantage in phosphorus uptake at seedling stage, to be specific, D34 showed relatively high phosphorus absorption capacity but no advantage in adaptability of phosphorus use efficiency, while only D37 showed relatively high phosphorus absorption capacity and phosphorus use ca- pacity. Correlation analysis and path analysis showed that the level of phosphorus efficiency of soybean at blooming stage under （-P） and （＋P） treatments was mainly determined by phosphorus absorption capacity, and that under （-P） treatment was significantly greater than （＋P） treatment. Phosphorus uptake and phosphorus use ef- ficiency under （-P） and （＋P） treatments both showed great direct effects on phos- phorus efficiency, and phosphorus uptake made greater contribution; however, the indirect effects were relatively low, Under low phosphorus stress, the mechanisms for various soybean genotypes with high phosphorus efficiency to adapt to low phospho- rus stress were different, and phosphorus absorption efficiency （phosphorus uptake） was the main variation source of the phosphorus efficiency of various soybean genotypes at blooming stage. [Conclusion] This study revealed the contribution made by phosphorus absorption effi[目的]研究低磷胁迫下不同磷效率基因型大豆花期的磷营养效率。[方法]选用4个"磷低效"大豆基因型(D03、D05、D17和D18)和4个"磷高效"大豆基因型(D31、D34、D37和D38)为试验材料,采用土培试验,设高磷(+P)和低磷(-P)2个处理,分析不同磷效率大豆基因型的含磷量、吸磷量和磷的利用效率与磷效率的关系。[结果]低磷处理下,4个磷高效基因型大豆苗期植株吸磷量的优势均较明显,D34表现出较强的磷吸收能力,但其磷利用效率的适应性并未表现出优势,只有D37表现出较强的磷利用能力和吸磷能力。相关与通径分析表明,在大豆花期(-P)和(+P)处理下,大豆磷效率的高低主要是由吸磷能力的强弱来决定的,(-P)处理明显大于(+P)处理。(-P)和(+P)处理的吸磷量和磷的利用效率对磷效率直接影响均较大,而吸磷量贡献更大;间接影响均较小。低磷胁迫下,在大豆的营养生长阶段花期,磷高效基因型适应低磷的机理是不同的,磷吸收效率即吸磷量是不同基因型大豆花期磷效率的主要变异来源。[结论]该研究明确了不同磷效率基因型大豆的磷吸收效率和磷利用效率对磷效率的贡献。

关 键 词：SOYBEAN Low phosphorus stress Phosphorus efficiency Absorption ef- ficiency Use efficiency 

分 类 号：S565.1[农业科学—作物学]