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Planta Daninha

Print version ISSN 0100-8358

Abstract

SILVA NETO, P. J. et al. Development,assimilate partition and dry matter production in soybean (Glycine max (L.) merrill) plants treated with four doses of metribuzin. Planta daninha [online]. 1991, vol.9, n.1-2, pp. 65-75. ISSN 0100-8358.  http://dx.doi.org/10.1590/S0100-83581991000100007.

Development, assimlate partition and dry matter production in soybean (Glycine Max (L.) Merri ll, cv. Uberaba) plants treat ed with four metri buzin doses (0,0; 0,35; 0,70 and 1,05 kg i.a.ha-1) were studied in a field experiment. Metribuzin did not reduce the stand or alter ed significantly shoot /root ratio. Plants height average incre ased as the doses of metribuzin increased; maximum heights were 761, 784, 815 and 812 mm, for increasing metribuzin doses. Metribuzin did not alter the pattern of sequential dry matter partition in the plants. Metribuzin did not affect dry matter accumulation in pods (Wv); however, from initiation to the end of maturation of seeds the control presented greater Wv values than trea plants, due to its highest net assimilation rate after blooming. Pericarp dry matter (Wp) was decre ased from full development se eds to final harvest for all treatments, except for Wp of plant streated with 0,7 i.a.ha-l that was maintained practically. Constant on the other hand, seed dry matter increased accentuately, from formation to last harvest, for all doses employed.

Keywords : metri buzin; biomass; morphology; soybeans.

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