薯块膨大中期不同栽培措施对甘薯生长发育及产量的影响

Effects of Different Cultivation Measures during Vegetative Propagation on Growth and Yield of Sweet Potato

为探索薯块膨大中期简便易行的增产措施,研究了甘薯中后期翻蔓、提蔓、喷施多效唑、喷施缩节胺、摘除枝条等措施对其生长发育及产量的影响。结果表明:与对照(不作处理)相比,提蔓和喷施多效唑、缩节胺能有效控制旺长,叶面积指数降低,但中后期光合势并未降低,地上部干重降低,块根干重增加,单株薯数增加,分别增产11.28%、16.15%和8.27%,其中喷施多效唑效果最好。

In order to explore the simple and convenient cultivation measures for impoving yield during vegetative propagation in sweet potato,the effects of turning over the vines(T1),raising the vines(T2),spraying paclobutrazol(T3),spraying mepiquat chloride(T4),and branch-removal(T5) on growth and yield of sweet potato during vegetative propagation were studied.The results showed that the excessive growth was controlled effectively by T2,T3,and T4,leaf area index(LAI) was reduced,but photosynthetic potential(LAD) was not decreased during vegetative propagation,dry weight of aboveground was decreased,the sweet potato number per plant was increased,so the yield was increased by 11.28%,16.15% and 8.27%,respectively,and the effects of spraying paclobutrazol was the best.