Paper Information

Journal:   JOURNAL OF WATER AND SOIL (AGRICULTURAL SCIENCES AND TECHNOLOGY)   MARCH-APRIL 2012 , Volume 26 , Number 1; Page(s) 11 To 19.
 
Paper: 

THE EFFECTS OF SOIL COMPACTION ON TUBER YIELD AND QUALITY AND UPTAKE OF NUTRIENTS BY POTATO PLANT (SOLANUM TUBEROSUM L.)

 
 
Author(s):  BEHBOOD M.*, GOLCHIN A., BESHARATI H.
 
* COLLEGE OF AGRICULTURE, ZANJAN UNIVERSITY
 
Abstract: 

To evaluate the effects of soil compaction on tuber yield and quality and uptake of nutrients by potato plant, an experiment with completely randomized design and three replications was conducted in greenhouse of Soil Science Department, Zanjan University, Zanjan, Iran. In this experiment, potato tubers were sown in a loamy soil with different levels of compaction or bulk density. The bulk densities of soils used in this study were 1.3 (control), 1.56 and 1.8 gr/cm3 respectively. The results of analysis of variance of data showed that potato yield and the concentrations of macro- and micronutrients, in leaf and tuber, decreased as the level of soil compaction increased. The decrease in concentration was greater for N, P and K than the other nutrients. Comparison of means showed that potato yield was 6.32 kg/m2 for control treatment which was significantly more than those treatments with higher bulk densities (5.87 and 5.13 kg/m2 respectively). The tuber yield of control was respectively 7 and 19% higher than those of treatments with densities of 1.56 and 1.8 g/cm3. The highest mean for tuber number was obtained for control and it decreased by 46.1 and 47.5% in treatments with densities of 1.56 and 1.8 g/cm3 respectively. The difference in tuber number was not significant between second and third levels of compaction. The highest tuber length and diameter were measured in control treatment and the size of tuber decreased as the compaction level of soil increased. The leaf concentrations of macro- and micro- nutrients were higher in control treatment than the treatments with higher bulk densities compaction and the decrement of concentration with compaction was greater for macronutrients than micronutrients. The tuber concentrations of nutrients were also decreased by increasing soil compaction and the highest decrement in N, P and K concentrations were 52.3, 34.7 and 45.6% respectively. The result of this study indicate that soil compaction restricts root growth and development and thereby decreases plant uptake of nutrients, potato yield, size and number of tubers and leaf and tuber concentrations of macro- and microelements.

 
Keyword(s): SOIL COMPACTION, BULK DENSITY, POTATO, MACRO-ELEMENTS, MICRO-ELEMENTS
 
References: 
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