Nutrient uptake in cotton in relation to plant architecture |
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Authors: | J G Bhatt E Appukuttan |
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Institution: | (1) IARI Regional Station, Coimbatore-3, India |
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Abstract: | Summary The studies on uptake of nitrogen, phosphorus and potassium by two morphologically contrasting varieties of cotton MCU-1 and
PRS-72 (bothGossypium hirsutum L.) at weekly intervals, showed that till the bursting of early formed bolls, the former type accumulated these nutrients
in larger quantities in leaves and stem than in the fruiting parts unlike the latter type where differences in nutrient contents
of these organs were very narrow till the active bolling phase. From flowering onwards, the fruiting parts of PRS-72 contained
more phosphorus. Because of its bushy habit more dry matter accumulated and more nutrients remained unutilised in leaves and
stem of MCU-1 at harvest compared with the short-branch variety PRS-72. Though both the varieties gave the same yield of seed
cotton per unit area, PRS-72 removed considerably less quantities of nitrogen, phosphorus and pottassium. The short fruiting
branch character in cotton therefore appears to contribute substantially towards balanced and economic utilization of nutrients. |
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