ISSN:
1573-5036
Source:
Springer Online Journal Archives 1860-2000
Topics:
Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
Notes:
Summary Submergence caused a small initial decline followed by a gradual increase in pH values of soil solution. At field capacity too, the pH showed similar trends but the changes were much less pronounced. The redox potential of soil solution decreased sharply and assumed negative value after five weeks of submergence. At field capacity, however, more or less similar values were maintained throughout the growing period of rice plants. Submergence caused an increase in concentration of both water-soluble iron and manganese. The concentration of water-soluble phosphorus increased upon submergence, reached maximum and then decreased. The changes in phosphorus concentration at field capacity were irregular. The concentration of nitrate decreased under submerged condition but the case was reverse at field capacity. Submergence resulted in an accumulation of ammoniacal nitrogen. At field capacity also the concentration of ammonical nitrogen increased with time, but the increase was much less pronounced. Submergence caused an increase in the concentration of calcium, magnesium, and potassium in the soil solution. The nitrogen, phosphorus, potassium, calcium, and iron contents of rice plants grown under submerged condition were higher than those in plants grown at field capacity condition. The plants grew better under submerged condition than at field capacity condition. The yield of grain was better under submerged condition than that at field capacity condition. Better growth and yield was associated with higher uptake of nutrients by rice plants grown under submerged condition.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00264173
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