不同磷效率大豆品种光合特性的比较.pdfVIP

作物学报 ACTA AGRONOMICA SINICA 2009, 35(3): 522−529 /zwxb/ ISSN 0496-3490; CODEN TSHPA9 E-mail: xbzw@ DOI: 10.3724/SP.J.1006.2009.00522 不同磷效率大豆品种光合特性的比较 * 敖 雪 谢甫绨 刘婧琦 张惠君 , 110161 : , , , , , , , CO2 , , , , , , , : ; ; Comparison of Photosynthetic Characteristics in Soybean Cultivars with Different Phosphorus Efficiencies * AO Xue, XIE Fu-Ti , LIU Jing-Qi, and ZHANG Hui-Jun College of Agronomy, Shenyang Agricultural University, Shenyang 110161, China Abstract: Soybean is sensitive to phosphorus deficiency in whole growth stage. Phosphorus plays an important role in photosyn- thesis. Our objective is to compare the difference of photosynthetic characteristics in soybean cultivars with different phosphorus efficiencies under different phosphorus levels in Shenyang during 2006–2007. The results showed that the soybean cultivars with high phosphorus efficiency had higher seed yields and higher seed phosphorus efficiency at each of the three phosphorus levels. Under phosphate deficiency condition, the cultivars with high phosphorus efficiency had a higher photosynthesis and CO2 assimi- lation capacity, as well as higher soluble protein content, lower stomatal restriction and higher yield. The contents of chlorophyll, soluble protein, net photosynthetic rate, stomatal conductance and mesophyll conductance all reached the peak at the podding stage, and then descended. Growth rate, leaf