不同肥力和密度处理对超高产大豆品种的光合特性和产量的影响

Effects of fertilizer and planting density on photosynthetic characteristics and yield of super-high-yielding soybean cultivar

以超高产大豆辽豆14号与普通产量大豆辽豆11号为试材,研究了不同施肥水平和种植密度处理对其光合特性和产量的影响。结果表明,不同施肥水平下,辽豆14号叶片的光合速率从盛荚期以后均高于辽豆11号;不同种植密度水平下,辽豆14号叶片的光合速率从始粒期以后均高于辽豆11号。辽豆14号在始粒期的光合速率日变化未出现"午休"现象,而且整个鼓粒期保持了较高的叶面积指数。成熟时收获指数高,植株抗倒伏能力强是超高产品种的明显特征。

Effects of different fertilizer levels and planting densities on photosynthetic characteristics and yield of super-high-yielding soybean cultivar of Liaodou 14 and common -yielding soybean cultivar of Liaodou 11 were studied. Results showed that the leaf photosynthetic rate of Liaodou 14 was higher than that of Liaodou 11 in different fertilizer treatments after full podding stage. The leaf photosynthetic rate of Liaodou 14 was higher than that of Liaodou 11 in the different planting density treatments after initial grain filling stage. The diurnal variation of photo- synthesis of Liaodou 14 did not have ＂noontime snooze＂ at initial grain filling stage. In contrast to Liaodou 11, Liaodou 14 had much higher leaf area index during grain filling stage. High harvest index and strong lodging resistance were the typical traits of super-high-yielding soybean cultivar.