Effect of K and Na applied in different proportions of the growth, yield and nutrient content of cassava (Manihot esculenta Crantz.)
1999
Devi, C.R.S. | Padmaja, P.(College of Agriculture, Vellayani (India). Dept. of Soil Science and Agricultural Chemistry)
Field experiments were conducted during 1991-1994 to study the effect of K and Na applied in different proportions on the growth, yield and nutrient content of cassava grown on a Rhodic Haplustox. Weight of plants was maximum when the proportion of K and Na applied was 50:50 as muriate of potash and sodium chloride (common slat), respectively. Application of Na alone significantly reduced plant weight. Highest number of roots root volume and tuber yield were observed in plants receiving 50% K as muriate of potash and 50% Na as common salt. Proportionate decrease in number of roots and root volume was obtained when the proportion fo Na exceeded 50%. Lower yields at 25 and 75% levels indicated that there was a synergistic effect in the combination of K and Na at 50% level. Content of N and P was more in Na-supplied treatments and K in full K treatment in the early stages of growth. Absorption of N and P decreased and K increased in Na-added treatments towards the later stage of growth. Na content was the highest in 100% Na treatment. Absorption of Ca and Mg was lesser in full K treatment compared to other treatments. Addition of Na did not have any adverse effect on availability of nutrients.
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