Dears, low, middle and high plant population density with early and late sowing date. In which sowing date and density the NPK accumulation will be high or low in cotton crop?
As I understand, cotton shows considerable response to planting dates; so expect nutrient uptake trends to follow the yield trends. For example, late and early planting may correspond with low nutrient uptake.
At high density and early sowing nutrient uptake will be more as cotton crop is long duration crop and responsive to fertilizer, specifically nitrogenous fertilizer
Looking at the problem at hand, nutrient uptake increases with density. However, after certain density plants tend to correct their architecture to adjust to available space, water and soil. Hence, after certain density uptake decreases, unless some interventions are made. In the current scenario, I feel medium density with early planting will have the highest uptake of nutrients.
When weed control is a primary issue high population can be expected to help suppress weeds. Generally the water availability can become the most limiting factor. Under limiting moisture conditions populations are targeted lower to allow greater expression of root development. In the humid Eastern Corn Belt the populations for maximizing yield might be higher than in drier Western Corn Belt. Nutrient needs will be a function of yield expectation and the soil ability to provide nutrients. Most efficient use of nutrients is by using pre plant strategically applied close to expanded seedlings and lay by applied at beginning of last time cotton might by cultivatable. This second application can be adjusted based on foliar analysis and targeted to the real need of the plant.
High plant density and early plant sowing will uptake more nutrient uptake compared to other because in high plant density ,number of plants will be more and also when it sow earlier then its response will be double to the rest of densities.
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