Effect of Top Dressing of Nitrogen Fertilizer on the Formation of Superficial Roots of Rice Plants

Comparison of root length of two rice (Oryza sativa L.) varieties by using an Image Analyzer

“…The roots were the longest in the No 3 treatment where top-dressing was carried out shortly prior to core sampling, and this treatment may have promoted the growth of the superficial roots (Kawata et al, 1977b). In contrast, the roots were the shortest in the No 5 treatment, where a large amount of nitrogen was applied, and this treatment may have inhibited the root growth as reported by other workers (Bosemark, 1954;Mitsui and Kumazawa, 1964).…”