ABSTRACT

An experiment was conducted to understand plant available B status in Entisols and Inceptisols of the Gangetic alluvial plains for cauliflower and to determine critical concentrations of B in soils and plants of cauliflower by using polynomial equations. Soil and cauliflower crops (plant and curd) were collected from 81 cauliflower growing farmers’ fields. Soil samples were analyzed for available B by using hot-CaCl₂ (HCC), KH₂PO₄ (PDP), tartaric acid (TA) and HCl (HCl) and cauliflower crop samples for B concentration. Hot-CaCl₂ and dilute HCl extracted a higher amount of B followed by TA and PDP in decreasing order. Better relationships of HCC and HCl with soil properties, cauliflower curd and plant weight and B concentration in crop tissues proved their superiority over TA and PDP for assessing B availability for cauliflower in soil. The critical level of adequate HCC and HCl extractable B concentrations were 0.53 and 0.54 mg kg⁻¹ in Entisols and 0.57 and 0.58 mg kg⁻¹ in Inceptisols, respectively. Similarly, critical B concentration in cauliflower plant was 21.5 and 23.8 mg kg⁻¹ in Entisols and Inceptisols, respectively. The novel approach of determination of critical limits of B by using polynomial equations was found effective.

摘要

进行了一项实验，以了解恒河冲积平原花椰菜的 Entisols 和 Inceptisos 中植物有效 B 的状态，并使用多项式方程确定花椰菜土壤和植物中 B 的临界浓度。从 81 个种植花椰菜的农民田地中收集土壤和花椰菜作物（植物和凝乳）。_{通过使用热 CaCl 2} (HCC)、KH ₂ PO ₄ (PDP)、酒石酸 (TA) 和 HCl (HCl) 和花椰菜作物样品的 B 浓度分析土壤样品中的有效 B。热氯化钙₂稀 HCl 提取的 B 含量较高，其次是 TA 和 PDP，按降序排列。HCC 和 HCl 与土壤特性、花椰菜凝乳和植物重量以及作物组织中 B 浓度的更好关系证明了它们在评估土壤中花椰菜的 B 有效性方面优于 TA 和 PDP。足够的 HCC 和 HCl 可提取 B 浓度的临界水平在 Entisol 中分别为 0.53 和 0.54 mg kg -1 ，在Inceptisol^中分别为0.57 和 0.58 mg kg ^-1。同样，花椰菜植物中的临界 B 浓度在Entisols和Inceptisols中分别为 21.5 和 23.8 mg kg ^-1， 分别。发现使用多项式方程确定 B 临界极限的新方法是有效的。