Estimation of Cotton Nutrient Uptake Based on the QUEFTS Model in Xinjiang

The Xinjiang cotton-producing region is the main cotton-growing in China; however, combination of excessive application but low utilization fertilizers has restricted its agricultural development. Estimating balanced nutrient requirements for cotton essential to increase yield and use efficiency. results from 372 field experiments performed between 1996 2019 were used build a QUEFTS (quantitative evaluation fertility tropical soils) model investigate relationships seed accumulation, with data 2017 2020 validate model. demonstrated that predicted linear relationship target uptake until reached about 60–70% potential yield. To produce 1000 kg cotton, 28.3 N, 6.1 P, 29.6 K required corresponding ratio was 4.64:1:4.85. internal efficiencies (IEs) 35.4, 163.2, 33.7 kg/kg, respectively. Field validation indicated could be estimate at targeted contribute developing fertilizer recommendation strategy production.