EFFECT OF FERROUS SULPHATE APPLICATION THROUGH SOIL WITH AND WITHOUT FYM ON THE AVAILABILITY OF IRON IN SOIL AND YIELD OF UPLAND RICE (Oryza sativa, L.)
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Date
08-05-86
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MAHATMAl PHULE AGRICULTURAL UNIVERSITY,, RAHURI, ( Dist.-Ahmednagar ) ( MAHARASHTRA )
Abstract
A field experiment was conducted on medium black calcareous soil (vertic ustropepts) on rice cv.Karjat 184 during the kharif 1985 at the Post Graduate Instructional Farm, Mahatma Phule Agricultural University, Rahuri. The objective was to study the effect of application of ferrous sulphate through soil with and without FYM on the release of iron and phosphorus in soil and their uptake and yield in upland rice. (Oryza sativa, L.) The soil had pH 8.65. organic carban 0.49%, CaC03 equivalent 8.0%, Olsen-p 18.2 kg/ha and DTPA extractable Fe 2.55 ppm. The result showed that the application of ferrous sulohate and FYM decreased the pH slightly (8.65 to 3.52} nd increased the specific conductance of the soil. The application of ferrous sulphate @ 20 kg/ha recorded the highest concentration of Olsen-P (24.05 kg/ha) and DTPA - Fe (3.71 ppm) in soil at tillering stage. An addition of FYM @ 5 t/ha further increased the concentration of Olsen-P and DTPA - Fe in soil at all the growth stages of rice. The application of ferrous sulphate and FYM significantly increased the dry matter yield at all the growth stage- of rice. The highest dry matter yield of 39.75 q/ha was recorded at harvest stage and addition of FYM further increased the dry matter to 42.82 q/ha. The higher uptake of P (11.82 kg/ha) was observed at flowering stage while highest uptake of Fe (589.16 q/ha) was recorded in straw at harvest stage due to application of FYM and ferrous sulphate, respectively. In general the..increasing trends in uptake of Fe and P by rice was observed.at all the growth stages of riceā¦It is, thus, evident from the present study that application of ferrous sulphate and FYM is essential on.medium black calcareous soil for the increased concentrationof Olsen-P and DTPA -Fe in soil and their uptake and yield of uoland rice.