ABSTRACT

Balanced application of phosphorus (P) fertilizer is important for productive agricultural systems with a reduced environmental footprint. This study aimed to assess the effect of P on the leaf yield, P use efficiency, P concentration and uptake by Aloe vera. A pot trial experiment was conducted using a completely randomized design, with six levels of P applied at 0, 30, 45, 60, 80, and 120 kg ha⁻¹, replicated in triplicate. The results revealed that yield attributes, leaf yield, P concentration and uptake were significantly improved with P application and optimum results were obtained when P was applied at 80 kg ha⁻¹. The addition of P increased leaf yield by 33 to 91% compared to the untreated control. Likewise, the highest numbers of suckers, leaves, fresh and dry gel weight, and profit based on benefit cost ratio was recorded with this treatment. In contrast, the highest P concentration and uptake by the leaf were observed at the highest P treatment rate of 120 kg ha⁻¹. The highest plant height, leaf area and fresh gel weight were responsible for the production of higher leaf yield. The minimum amount of P for 80% leaf biomass production was estimated to be 43.9 kg ha⁻¹ whereas the critical leaf P concentration was 0.62% for Aloe vera cultivation. The result suggests that application of 80 kg P ha⁻¹ could produce economically higher yield of A. vera, and further investigation is now required to validate these results for other soil types under field conditions.

摘要

磷（P）肥料的均衡施用对于减少环境足迹的生产性农业系统很重要。这项研究旨在评估磷对芦荟叶片产量，磷利用效率，磷浓度和吸收的影响。使用完全随机的设计进行盆栽试验，在0、30、45、60、80和120 kg ha ^-1下施用六种水平的P ，重复三次。结果表明，施用磷肥能显着提高产量，叶片产量，磷素含量和吸收量，在80 kg ha ^-1下施用磷肥可获得最佳结果。。与未处理的对照相比，磷的添加使叶片产量增加了33％至91％。同样，用该处理记录了最大数量的吸盘，叶片，新鲜和干燥的凝胶重量以及基于收益成本比的利润。相反，在120 kg ha ^-1的最高磷处理速率下，观察到了最高的磷浓度和叶片吸收磷。最高的株高，叶面积和新鲜的凝胶重量是产生较高叶片产量的原因。80％的叶片生物量产生的最低磷含量估计为43.9 kg ha ^-1，而芦荟栽培的临界叶片P浓度为0.62％。结果表明，施用80 kg P ha ^-1可以经济地获得较高的产量。A. vera，现在需要进一步的研究以验证田间条件下其他土壤类型的这些结果。