Evaluation of Efficiency and Response of Quinoa Plant to Nitrogen Fertilization levels

A. M. Almadini, A. Badran, Abdullah Algosaibi
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引用次数: 10

Abstract

A field experiment was conducted to evaluate the response of the quinoa yield to nitrogen (N) fertilization, the nitrogen use efficiency (NUE) as well as the correlation coefficient to determine the important traits that contribute in determining the productivity of quinoa crop. Three levels of N fertilizer (i.e., 0, 80 and 160 kg N ha -1 ) were used and laid out in a randomized complete block design with four replicates. The results showed that all tested characteristics were significantly increased with increasing N fertilizer treatments showing grain yields per plant varying from 2.48 to 18.08 g plant -1 and grain yields per hectare ranging from 101.23 to 770.2 kg ha -1 . In contrast, NUE was significantly reduced with increasing N fertilizer rates from 5.52 to 4.31. The results indicated that there were significant effects of treatments on some chemical components in grains at 0 and 160 kg N ha -1 (i.e., 14.81 and 17.13% protein respectively); N, phosphorus (P) and potassium (K) contents in grains, roots and stem. According to the correlation between the vegetative traits and grain yield kg ha -1 varied from 0.95 for no. of leaves plant -1 to 0.99 for chlorophyll content, fresh weight plant -1 as well as leaf area. Also, the simple correlation among agronomic and chemical traits had significant and positive relations with the grain yield kg ha -1 under the investigated N treatments with an exception of P content that recorded a relatively high negative correlation with grain yield ha -1 (-0.589). It may be concluded from obtained results that dry weight as a vegetative trait, grain yield plant -1 as an agronomic trait and the ash as a chemical trait should be taking in considerations suggesting the importance of direct selection for these traits as important ones with grain yield ha -1 under studied treatments.
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藜麦植株对氮肥水平的效率及响应评价
通过田间试验,研究了藜麦产量对氮肥、氮素利用效率(NUE)及相关系数的响应,以确定影响藜麦产量的重要性状。施用3个水平的氮肥(即0、80和160 kg N ha -1),采用完全随机区组设计,设4个重复。结果表明,各试验性状均随施氮量的增加而显著增加,单株籽粒产量在2.48 ~ 18.08 g -株-1之间,每公顷籽粒产量在101.23 ~ 770.2 kg - ha -1之间。氮肥用量从5.52增加到4.31,氮肥利用效率显著降低。结果表明:0和160 kg N ha -1处理对籽粒部分化学成分(蛋白质含量分别为14.81和17.13%)有显著影响;籽粒、根、茎中氮、磷、钾含量。营养性状与籽粒产量kg ha -1的相关系数为0.95。叶片叶绿素含量为-1 ~ 0.99,鲜重为-1,叶面积为-1。除磷含量与籽粒产量ha -1呈较高负相关(-0.589)外,各施氮处理的农艺性状和化学性状间的简单相关均与籽粒产量kg ha -1呈显著正相关。综上所述,干重作为营养性状,籽粒产量作为农艺性状,灰分作为化学性状应予以考虑,说明在研究处理中,这些性状作为籽粒产量的重要性状应直接选择。
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