大垄双行水平对栽不同密度“商薯19”对产量的影响  

Study on the Effect of Different Density on the Yield of‘Shangshu 19’Sweet Potato Horizontally Planted at Counterpoint in Double Row on Wide Ridge

作　　者：陈鹏博 CHEN Pengbo(Shangluo Agricultural Science Research Institute,Shaanxi Shangluo 726000,China)

机构地区：[1]陕西省商洛市农业科学研究所,陕西商洛726000

出　　处：《西藏农业科技》2024年第4期45-47,共3页Tibet Journal of Agricultural Sciences

摘　　要：为进一步挖掘甘薯增产潜力,采用农机-农艺结合的大垄双行水平对栽法,以“商薯19”为试材,设置5个密度处理,考察不同密度对“商薯19”产量的影响。结果发现,当密度为56667株/hm^(2)时,“商薯19”产量最高,达到49986.11 kg/hm^(2)。此密度下大薯数量、产量最高,中薯数量、产量居第二位,但大、中薯率和平均大薯质量排序靠后。说明在大垄双行水平对栽模式下,密度对甘薯产量的影响主要通过增加大、中薯数量和产量来实现,而与大、中薯率关系不大。当密度超过56667株/hm^(2)时,薯块均匀化程度增加,且中薯数量和产量开始占优势。本研究为甘薯大垄双行水平对栽模式找到产量最佳的栽植密度,并为追求薯形适中和鲜食目的的甘薯生产提供了思路。To further explore the yield potential of sweet potato,this study adopted a method called“horizontally planting at counterpoint in double rows on wide ridge”,combining agricultural machinery and agronomy and took‘Shangshu 19’as test object.5 density treatments were set up to investigate the effects of different densities on the yield of‘Shangshu 19’.The results showed that yield of‘Shangshu 19’reached a highest level(49986.11 kg/hm^(2))when the plant density was 56667 plants/hm^(2).In this density,the number and yield of large sweet potato were the highest and the medium ones were the second,but the ratio of large ones,the ratio of medium ones and the average weight of large ones were lower.The results suggested that the effect of density on the yield of sweet potato was mainly realized by increasing the quantity and yield of large and medium sweet potato,but had little relationship with the ratio of large and medium ones.The size difference of sweet potatoes narrows and the number and yield of medium sweet potato began to dominate since the density was over 56667 plants/hm^(2).This study found the best planting density for horizontally planting at counterpoint in double rows on wide ridge and provided an idea to product sweet potatoes with moderate shape to meet fresh food demand.

关 键 词：大垄双行水平对栽 “商薯19” 密度 产量 

分 类 号：S531[农业科学—作物学]