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首页> 外文期刊>Journal of Agronomy >Zinc Soil Test Calibration Based on 0.1 N HC1 Extractable Zinc and Cation Exchange Capacity from Upland Soils of Northern Nigeria
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Zinc Soil Test Calibration Based on 0.1 N HC1 Extractable Zinc and Cation Exchange Capacity from Upland Soils of Northern Nigeria

机译：基于0.1 N HC1可提取锌和尼日利亚北部旱地土壤阳离子交换能力的锌土壤测试校准

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摘要

A soil-zinc calibration test study based on 0.1 N HC1 extractable zinc and Cation Exchange Capacity (CEC) was carried out with upland soils of Northern Nigeria using maize (Zea mays L. moench) as a test crop. Treatments consisted of (1) no zinc and (ii) 10 mg kg~(-1) Zn (greenhouse) and five levels of Zn as ZnSO_4. 7 H_2O (field) replicated 3 and 6 times in a randomized complete block design respectively. Plant zinc concentration increased with levels of applied Zn. Higher zinc concentrations were observed in plants that received Zn application. Extractable Zn concentration increased with an increase in CEC. A positive correlation was also observed between extractable Zn and pH. HC1 extractable-Zn correlated positively and significantly with Zn uptake in the first and second crops (r = +0.735** and +0.575**), respectively. The amount of Zn extracted by 0.5 N HC1 was also significantly correlated with CEC. The amount of Zn extracted by 0.1 N HC1 was significantly correlated with the Zn uptake by thefirst and second crop. The regression equations obtained from this study indicated that the distribution of ions in the exchange site of soils should be considered in estimating plant Zn requirements in soils of the northern Nigeria. However available information on the soil CEC can be used to estimate or predict the Zn concentration of the plant tissue. Critical limits may not be required in estimating or interpreting plant Zn fertilization, as regression equations are more reliable and not empirical.
机译：在尼日利亚北部的旱地上，以玉米（Zea mays L. moench）为试验作物，进行了基于0.1 N HCl提取锌和阳离子交换容量（CEC）的土壤锌校准试验研究。处理包括（1）无锌和（ii）10 mg kg〜（-1）Zn（温室）和五种水平的ZnSO_4。 7 H_2O（场）在随机完整块设计中分别复制了3次和6次。植物锌的浓度随施锌量的增加而增加。在接受锌施用的植物中观察到较高的锌浓度。随着CEC的增加，可提取的Zn浓度增加。锌和pH值之间也存在正相关关系。 HCl提取的锌与第一季和第二季作物中锌的吸收呈正相关且显着相关（r = + 0.735 **和+ 0.575 **）。 0.5 N HCl提取的锌量也与CEC显着相关。 0.1 N HCl提取的锌量与第一季和第二季的锌吸收量显着相关。从这项研究中获得的回归方程表明，在估算尼日利亚北部土壤中植物对锌的需求量时，应考虑土壤交换点中离子的分布。但是，土壤CEC上的可用信息可用于估计或预测植物组织中的Zn浓度。在估计或解释植物锌的施肥量时可能不需要严格的限制，因为回归方程更可靠且不是经验性的。

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