Phosphate Requirement of Acidic Soils in Northeast India: A Reappraisal Based on Phosphate Sorption Isotherms

被引：3
|
作者：
Kumar, Manoj [1 ]
机构：
[1] ICAR Res Complex NEH Reg, Div Nat Resource Management Soil Sci, Umiam 793103, Meghalaya, India
来源：
NATIONAL ACADEMY SCIENCE LETTERS-INDIA | 2015年 / 38卷 / 05期
基金：
美国人文基金会;
关键词：
Soil acidity; P deficiency; Fertilizer requirement; Langmuir adsorption isotherm; PHOSPHORUS REQUIREMENTS; WHEAT;
D O I：
10.1007/s40009-015-0376-2
中图分类号：
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号：
07 ; 0710 ; 09 ;
摘要：
Batch adsorption studies were conducted to assess the P sorption characteristics and standard P requirement (SPR) of two representative acidic soils of northeast India: (1) Alfisol with pH 4.5 (S-4.5), and (2) Inceptisol with pH 5.0 (S-5.0). It is found that the actual P requirement of the acidic soils in northeast India may be higher than its present recommendation; and also, there exists considerable variation in P requirement of soils within the same region, which underlines the need of site-specific nutrient recommendation rather than a single blanket recommendation for the whole region.
引用
收藏
页码：383 / 386
页数：4
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