Vertical Diversity of Soil Dehydrogenase and Phosphatase Activity under Coconut (Cocos nucifera L.) and Arecanut (Areca catechu L.) Plantations in Different Agro-climatic Zones of Karnataka, India

IF 1.4 4区农林科学 Q4 SOIL SCIENCE Eurasian Soil Science Pub Date : 2024-02-20 DOI:10.1134/s106422932360224x

R. Vasundhara, Rajendra Hegde, S. Dharumarajan

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Abstract

The present study was conducted to investigate the vertical diversity of soil dehydrogenase and phosphatase activity under coconut (Cocos nucifera L.,) and arecanut (Areca catechu L.,) plantations within four soil depths (0–30, 30–60, 60–90, and 90–120 cm) and to determine the factors controlling the distribution across the different agro-climatic zones of Karnataka. A total of 176 soil samples from 30 soil profiles were collected from coconut and arecanut plantations representing 5 different agroclimatic zones (ACZ) and three soil types (Lixisols, Сambisols, and Acrisols) and analyzed for three major soil enzymes viz. dehydrogenase (DHA), acid phosphatase (ACP) and alkaline phosphatase (ALP). The results revealed that the pooled mean of DHA activity was higher in arecanut (7.44 µg TPF g^–1 h^–1) than coconut (5.75 µg TPF g^–1 h^–1) and the same pattern has been noticed in both ACP (84.041 and 48.19 µg PnP g^–1 h^–1 for arecanut and coconut plantations) and ALP (63.57 and 32.14 µg PnP g^–1 h^–1 for arecanut and coconut plantations). The impact of climate on soil enzyme activity showed that the southern dry zone (SDZ) was high in DHA (10.5 µg TPF g^–1 h^–1) and ALP (77.98 µg PnP g^–1 h^–1) activities followed by the eastern dry zone and the lowest was noticed in the coastal zone (CZ). However, ACP activity was higher in CZ (110.24 µg PnP g^–1 h^–1) and lower in SDZ (33.85 µg PnP g^–1 h^–1). As soil depth increases enzyme activity is decreased and nearly 50% of enzyme activities are restricted within 0–30 cm soil depth. We observed that greater activity of DHA and ALP was noticed in Lixisols than in Acrisols and Cambisols, whereas higher activity of ACP was found in Acrisols. Our analysis showed that the type of plantations, climate and soil type significantly affect the distribution of enzymes in soil.

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印度卡纳塔克邦不同农业气候区椰子（Cocos nucifera L.）和坚果（Areca catechu L.）种植园土壤脱氢酶和磷酸酶活性的垂直多样性

摘要本研究旨在调查椰子（Cocos nucifera L.）和山胡桃（Areca catechu L.）种植园在四种土壤深度（0-30、30-60、60-90 和 90-120 厘米）下土壤脱氢酶和磷酸酶活性的垂直多样性，并确定控制其在卡纳塔克邦不同农业气候区分布的因素。研究人员从代表 5 个不同农业气候区（ACZ）和 3 种土壤类型（Lixisols、Сambisols 和 Acrisols）的椰子和山胡桃种植园的 30 个土壤剖面中收集了共计 176 份土壤样本，并对三种主要土壤酶，即脱氢酶（DHA）、酸性磷酸酶（ACP）和碱性磷酸酶（ALP）进行了分析。结果显示，山胡桃（7.44 µg TPF g-1 h-1）的 DHA 活性集合平均值高于椰子（5.75 µg TPF g-1 h-1），ACP（山胡桃和椰子种植园分别为 84.041 µg PnP g-1 h-1 和 48.19 µg PnP g-1 h-1）和 ALP（山胡桃和椰子种植园分别为 63.57 µg PnP g-1 h-1 和 32.14 µg PnP g-1 h-1）的情况也相同。气候对土壤酶活性的影响表明，南部干旱区（SDZ）的 DHA（10.5 µg TPF g-1 h-1）和 ALP（77.98 µg PnP g-1 h-1）活性较高，东部干旱区次之，沿海地区（CZ）最低。然而，ACP 活性在 CZ 较高（110.24 µg PnP g-1 h-1），在 SDZ 较低（33.85 µg PnP g-1 h-1）。随着土壤深度的增加，酶活性降低，近 50% 的酶活性被限制在 0-30 厘米的土壤深度内。我们观察到，利西土层中 DHA 和 ALP 的活性高于赤土和寒武土层，而赤土中 ACP 的活性较高。我们的分析表明，种植类型、气候和土壤类型对土壤中酶的分布有很大影响。

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来源期刊

Eurasian Soil Science 农林科学-土壤科学

CiteScore

2.70

自引率

35.70%

发文量

137

审稿时长

12-24 weeks

期刊介绍： Eurasian Soil Science publishes original research papers on global and regional studies discussing both theoretical and experimental problems of genesis, geography, physics, chemistry, biology, fertility, management, conservation, and remediation of soils. Special sections are devoted to current news in the life of the International and Russian soil science societies and to the history of soil sciences. Since 2000, the journal Agricultural Chemistry, the English version of the journal of the Russian Academy of Sciences Agrokhimiya, has been merged into the journal Eurasian Soil Science and is no longer published as a separate title.