Plant nutrient removal by rice cultivated in acid sulfate soils : 1. The amount of plant nutrient removal in straw and grains of five varieties of rice
1986
Prapit Sangtong | Ninpraphai Chantanaphap | Kasemsri Sabson
Plant nutrient removal in acid sulfate soil area were studied by using 5 varieties of rice. The rice plants were harvested at the maturity from one square meter plots in each two rai. The plant part were divided into four parts : (a) filled grain (b) unfilled grain (c) upper part of stem and (d) lower part of stem. These two parts of stem supposed to be the part used for raising animal and the part that the farmer left in the field, respectively. The four parts of rice plants were analysed for the amount of nutient elements. The amount of nitrogen and phosphorus were highest in the filled grain especially in R.D. 7 and Khao Tah Haeng varieties. The accumulation of potassium, calcium, magnesium, sodium iron and manganese were found higher in the upper part than in the lower part of stem. However, all of the nutrient elements except nitrogen and phosphorus were accumulated in stem more than in grain.
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