IPI International Potash Institute
IPI International Potash Institute

Research Findings: e-ifc No. 45, June 2016

Impact of Potassium Fertilization Dose, Regime, and Application Methods on Cotton Development and Seed-Cotton Yield under an Arid Environment

Impact of Potassium Fertilization Dose, Regime, and Application Methods on Cotton Development and Seed-Cotton Yield under an Arid Environment

Dil Baugh Muhammad(1), Muhammad Naveed Afzal(1), Muhammad Tariq(1)*, and Abdul Wakeel(2)(3)*
print version pdf download pdf 2.25 MB

(1) Agronomy Section, Central Cotton Research Institute, Multan, Pakistan
(2) Institute of Soil and Environmental Sciences, University of Agriculture, Faisalabad, Pakistan
(3) IPI Consultant for Pakistan, International Potash Institute (IPI), Zug, Switzerland
* Corresponding authors: mtariq131@gmail.com; abdulwakeel77@gmail.com

Abstract

Modern cotton cultivars require more potassium (K) and its deficiency during peak bloom and boll setting period adversely affects the seed-cotton yield. The objectives of the present study were to determine the adequate K dose for the modern, transgenic cotton cultivar (Bt.CIM-616) grown on an arid light soil, to evaluate the effects of a split K application, and to quantify the contribution of additional foliar K applications on seed-cotton yield and its components. Two-year (2014-15) field experiments were conducted at the Central Cotton Research Institute, Multan, Pakistan, in two sets. In set-I, three K doses (0, 100 and 200 kg K2O ha-1) were applied at sowing or were split into two or four equal applications of 50 kg K2O ha-1 (pre-planting and 45 days after sowing or pre-planting, 30, 45 and 60 days after sowing) respectively. In set-II, the impact of preplanting applications of 0, 100 and 200 kg K2O ha-1, followed by four foliar sprays of 2% K2SO4 were evaluated for plant structure and yield components. The results revealed that supplemental K is a prerequisite for modern transgenic cotton grown on poor arid soils, as it ensures sufficient plant growth and development and subsequently increases the seed-cotton yields to considerable levels. However, basal K application alone would not fulfil the cotton yield potential. Splitting the annual dose to 2-4 mid-season sidedress applications significantly improved seed-cotton yield. Nevertheless, a basal K application, followed by four foliar sprays of 2% K2SO4 during the season resulted in the highest yield, obtaining up to 40% more yield than the non-fertilized control, and 10-15% more than that of the split soil-applied K. These results demonstrate the importance of matching plant K status to the dynamic crop demands for this nutrient, particularly in modern transgenic cotton cultivars.

En su idioma

Choose your Crop

Choose your App
IPI research e-ifc app for iPad and iPhone available now from the Apple App Store
IPI Research App for Android and Apple phones and tablets.

Infographics
The Role of Potassium (K) in the Plant (in Urdu)
Potassium and Nitrogen Use Efficiency (NUE) in Urdu
Potassium in Soil and Plant Systems (in Urdu)
IPI profile infographic
Chloride - an essential nutrient
Potassium and Nitrogen Use Efficiency (NUE)
Managing Water and Fertilizer for Sustainable Agricultural Intensification - infographic
Potassium Improves your Crop Quality
Potassium Improves your Health
Potassium in Soil and Plant Systems
The Role of Potassium (K) in the Plant
What does a Plant Need to Live
Assessment of the Impact of Targeted Use of Fertilizer on Irrigated Rice in Asia
The Role of Potassium (K) in the Plant (in Urdu)

New publication