萨赫勒地区磷的吸收特征:马里土壤的估计

IF 1.9 Q2 AGRICULTURE, MULTIDISCIPLINARY
Aliou Badara Kouyate, Vincent Logah, Robert Clement Abaidoo, Francis Marthy Tetteh, Mensah Bonsu, Sidiki Gabriel Dembélé
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引用次数: 0

摘要

& lt; abstract>撒哈拉以南非洲地区的作物产量经常受到低磷肥力的限制。该地区的农民可以施用磷矿,这应该会增加植物有效磷的水平,但这可能容易被萨赫勒地区的酸性土壤吸收。研究了在Tilemsi磷矿(TPR)处理下,马里萨赫勒地区4个代表性土壤系Longorola (Gleysol)、Danga (Fluvisol)、Niessoumana (arennosol)和Konobougou (Acrisol)对磷的吸附特性。磷的吸附数据是通过将5 g土壤在50ml 0.01M CaCl<sub>2</sub>含有六(6)种磷酸盐作为TPR(0、10、20、40、80、160 mg/L)。采用线性形式的Langmuir方程计算土壤的吸附参数。粘土含量最高的Gleysol的磷吸附最大值是粘土含量最低的Acrisol的3倍以上。用Langmuir吸附等温线(R<sup>2</sup>)可以很好地估计出59 ~ 200mg /kg范围内的最大吸附量。≥0.78)。土壤有机质和粘土含量影响TPR对磷的吸附。磷饱和度在2.39% ~ 6.47%之间,在砂硝中较高。在一项为期两季的Haplic Acrisol田间试验中,我们在玉米上试验了两种形式(粉状和颗粒状)的TPR以及水溶性磷酸二铵在不同剂量(0、11和16 kg P /ha)下的施用。水溶性DAP与TPR(粉末)效果相似(p <0.05)对土壤磷素有效性有显著影响,但DAP能提高粮食产量。由此可见,粉末状施用TPR可以提高磷作为水溶性DAP的有效性,对籽粒产量有积极影响。该研究为萨赫勒地区TPR修正剂的P吸收特性提供了有用的信息。& lt; / abstract>
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Phosphorus sorption characteristics in the Sahel: Estimates from soils in Mali

Crop yield in sub-Saharan Africa is often limited by low phosphorus fertility. Farmers in the region can apply phosphate rock, which should increase the plant-available phosphorus level, but this may be prone to sorption in acid soils of the Sahel. The objective of this study was to determine phosphorus (P) sorption characteristics of four representative soil series in Sahelian Mali namely, Longorola (Gleysol), Danga (Fluvisol), Niessoumana (Arenosol) and Konobougou (Acrisol) under Tilemsi Phosphate Rock (TPR) treatment. Data for phosphorus sorption was obtained by equilibrating 5 g of soils for 7 days at room temperature in 50 ml of 0.01M CaCl2 containing six (6) rates of phosphate as TPR (0, 10, 20, 40, 80,160 mg/L). The linear form of the Langmuir equation was used to calculate sorption parameters of the soils. The Gleysol with the greatest clay content had the highest phosphorus sorption maximum which was over three times greater than that of the Acrisol with the least clay content. The sorption maxima in the range of 59–200 mg/kg were well estimated with Langmuir sorption isotherm (R2 ≥ 0.78). Soil organic matter and clay contents influenced phosphorus sorption from the TPR. The degree of phosphorus saturation ranged from 2.39 to 6.47 %, being greater in the Arenosol. In a two-season field experiment on the Haplic Acrisol, we tested on maize, the TPR in two forms (powder and pellet) in addition to water-soluble diammonium phosphate at different rates (0, 11 and 16 kg P /ha). The water-soluble DAP and TPR (powder) had similar effects (p &lt; 0.05) on soil P availability but with DAP producing greater grain yields. This shows that application of TPR in powder form can improve phosphorus availability as water-soluble DAP with positive impact on grain yield. The study provides useful information on P sorption characteristics of TPR amendment in the Sahel.

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来源期刊
AIMS Agriculture and Food
AIMS Agriculture and Food AGRICULTURE, MULTIDISCIPLINARY-
CiteScore
3.70
自引率
0.00%
发文量
34
审稿时长
8 weeks
期刊介绍: AIMS Agriculture and Food covers a broad array of topics pertaining to agriculture and food, including, but not limited to:  Agricultural and food production and utilization  Food science and technology  Agricultural and food engineering  Food chemistry and biochemistry  Food materials  Physico-chemical, structural and functional properties of agricultural and food products  Agriculture and the environment  Biorefineries in agricultural and food systems  Food security and novel alternative food sources  Traceability and regional origin of agricultural and food products  Authentication of food and agricultural products  Food safety and food microbiology  Waste reduction in agriculture and food production and processing  Animal science, aquaculture, husbandry and veterinary medicine  Resources utilization and sustainability in food and agricultural production and processing  Horticulture and plant science  Agricultural economics.
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