不同施肥量对马铃薯产量的影响

Effects of Different Fertilizer Application on Potato Yield

为探讨复合肥对马铃薯增产的影响,在大田栽培条件下,以马铃薯"晋薯16号"为材料,研究不同复合肥用量(0,300,600,900,1 200和1 500kg·hm-2)对马铃薯产量的影响。结果表明,施肥均不同程度影响马铃薯产量,叶片叶绿素(a+b)含量、光合速率(Pn)和产量均随施肥量的增加呈先增加后降低的抛物线趋势。与对照相比,用量为1 200kg·hm-2复合肥可显著提高马铃薯株高和叶绿素含量,分别提高15.37%和21.51%;各施肥处理均可有效提高马铃薯叶片光合速率和产量,以1 200kg·hm-2施用量处理效果最为明显,增长率分别达66.67%和51.19%。因此,马铃薯以施1 200kg·hm-2复合肥为宜。

In order to investigate the effects of compound fertilizer on the yield of potato, cultivar ＂Jinshu 16＂ was used as material, and different fertilizer application rate（0,300,600,900,1 200 and 1 500 kg · hm^-2） was applied under field condition. Results showed that yield of potato could be effected by fertilization, and leaf chlorophyll content（a＋b） ,net photosynthetic rate （Pn） and yield showed a parabolic trend, increasing at first and then decreasing with the increase of fertilizer application rate. Compared with the control, fertilization at 1 200 kg · hm^-2 could significantly improve the potato plant height and chlorophyll content, up 15.37% and 21.51%, respectively; fertilization could effectively improve net photosynthetic rate of potato leaves and yield, with the application 1 200 kg · hm^-2 the most significant,increasing 66.67% and 51.19%, respectively. Therefore, the appropriate application of compound fertilizer in potato would be 1 200 kg ·hm^-2.