Evaluation of the nitrogen uptake efficacy of daikon radish under greenhouse conditions on sandy soils

IF 1.3 Q3 AGRONOMY
Miurel Brewer, Davie M. Kadyampakeni, Ramdas Kanissery, Samuel Kwakye
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Abstract

Cover crops can be a great addition to agricultural systems to improve soil health and nutrient cycling. One of the many qualities that cover crops possess is recovering residual nutrients. This study was established to estimate daikon radish (Raphanus sativus var. Longipinnatus) nitrogen (N) uptake, partitioning, and accumulation in a short time in Florida conditions. In greenhouse conditions, two Florida sandy soils were planted with daikon radish with three N rates (0, 50, and 101 kg N ha−1 as urea) following a randomized complete block with four replications. The treatments were organized in a two-by-three full factorial arrangement with the three N fertilizer rates. Biomass accumulation, N uptake, and partitioning into shoots and roots were estimated, and residual soil N was calculated. Increasing the amount of N applied to daikon radish plants did not increase biomass production or N accumulation in the shoots and roots of the plants. Daikon radish plants grown without N fertilization were able to produce a similar amount of biomass as those with N applications in their early growth stage. This suggests that daikon radish has the potential to adapt to the sandy soils of Florida and could efficiently utilize the residual soil N. This study shows the potential use of daikon radish as a cover crop in the row middles of citrus groves. The findings suggest that daikon radish plants could thrive in these unfertilized areas and offer promising benefits to the citrus orchards in terms of providing ground cover and additional advantages.

在温室条件下评估沙质土壤中萝卜对氮的吸收效果
覆盖作物是农业系统的重要补充,可改善土壤健康和养分循环。覆盖作物的许多特性之一是回收残留养分。本研究的目的是估算萝卜(Raphanus sativus var. Longipinnatus)在佛罗里达州条件下短时间内对氮(N)的吸收、分配和积累。在温室条件下,在佛罗里达州的两种沙质土壤中种植萝卜,采用四次重复的随机完全区组种植法,施氮量分别为 0、50 和 101 千克/公顷(以尿素计)。三种氮肥施用量的处理采用二乘三的全因子排列。估算了生物量积累、氮吸收量以及氮在芽和根中的分配情况,并计算了土壤中的残余氮。增加萝卜植株的氮肥施用量并不能提高植株的生物量产量,也不能增加植株芽部和根部的氮积累。未施用氮肥的萝卜植株在生长初期能产生与施用氮肥的植株相似的生物量。这表明萝卜具有适应佛罗里达州沙质土壤的潜力,并能有效利用土壤中残留的氮。研究结果表明,萝卜植株可以在这些未施肥地区茁壮成长,并在提供地面覆盖和额外优势方面为柑橘园带来可观的效益。
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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来源期刊
Agrosystems, Geosciences & Environment
Agrosystems, Geosciences & Environment Agricultural and Biological Sciences-Agricultural and Biological Sciences (miscellaneous)
CiteScore
2.60
自引率
0.00%
发文量
80
审稿时长
24 weeks
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