Effect of Seed Tuber Planting Depth and Nitrogen Rate on Yield and Yield Related Traits of Potato (Solanum tuberosum L.) at Haramaya and Hirna, Eastern Ethiopia

Bulti Merga, N. Dechassa, W. Mohammed
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引用次数: 4

Abstract

ABSTRACT The potato (Solanum tuberosum L.) is an important cash and food security crop in the eastern highlands of Ethiopia. However, the yield of the crop is constrained by low soil fertility and poor agronomic practices. Therefore, the field experiment was conducted at the main campus of Haramaya University and at Hirna Research substation during the 2015 main cropping season. The objective of the experiments was to elucidate the effect of seed tuber planting depth and nitrogen fertiliser rate on yield-related traits and yield of the crop. The treatments consisted of four seed tuber planting depths (5, 10, 15 and 20 cm) and five rates of nitrogen (0, 46, 92, 138 and 184 kg N ha−1). The experiment was laid out as a randomised complete block design with three replications. The results of the experiment at both locations revealed that the main effect of nitrogen application rate influenced total dry weight, unmarketable tuber yield, the percentage of small-sized and medium-sized tubers. Nitrogen rate and seed tuber planting depth also interacted to influence unmarketable tuber yield, the percentage of medium and large-sized tubers produced, and tuber starch content. The main effects of seed tuber planting depth significantly influenced total dry biomass, unmarketable tuber yield, total tuber yield, marketable tuber yield, the percentage of small-sized tubers produced and tuber starch content. Increasing seed tuber planting depth generally enhanced the aforementioned parameters. However, for most parameters, the highest values were obtained already at the seed tuber planting depth of 10 cm. The optimum total and marketable tuber yields of 26.93 t ha−1 and 26 t ha−1 for Haramaya and 34.57 t ha−1 and 32.65 t ha−1 for Hirna were obtained in response to planting seed tubers at the depth of 10 cm.
埃塞俄比亚东部Haramaya和Hirna种块茎种植深度和施氮量对马铃薯产量及相关性状的影响
马铃薯(Solanum tuberosum L.)是埃塞俄比亚东部高地重要的经济作物和粮食安全作物。然而,这种作物的产量受到土壤肥力低和不良农艺做法的限制。因此,在2015年主要种植季节,在原屋大学主校区和Hirna研究站进行了田间试验。本试验旨在阐明种块茎种植深度和施氮量对作物产量相关性状和产量的影响。4个种块茎种植深度(5、10、15和20 cm)和5个施氮量(0、46、92、138和184 kg N ha−1)。实验采用随机完全区组设计,有3个重复。两个地点的试验结果表明,施氮量主要影响总干重、滞销块茎产量和中小块茎比例。施氮量和种块茎种植深度也相互作用,影响滞销块茎产量、大中型块茎产出率和块茎淀粉含量。种子块茎种植深度对干总生物量、滞销块茎产量、总块茎产量、滞销块茎产量、小块茎产量和块茎淀粉含量有显著影响。增加种块茎种植深度总体上提高了上述参数。然而,对于大多数参数,在种块茎种植深度为10 cm时已获得最大值。种薯种植深度为10 cm时,原玛雅的块茎总产量和可售块茎产量分别为26.93 t ha - 1和26 t ha - 1,希尔娜的产量分别为34.57 t ha - 1和32.65 t ha - 1。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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