Zero Tillage Plus Residue Management and K Fertilization Effect on Cotton Yield and K Use Efficiency in Wheat-Cotton System

Niamat Ullah Khan


Zero tillage straw retained with optimum K is an important strategy to increase cotton (Gossypium hirsutum L.) yield and K efficiency in wheat (Triticum aestivum L.)-cotton system.  A 2 years field experiment was conducted during 2018, and 2019 to study the impact of [zero tillage straw as such on soil surface (ZTSAS) and zero tillage straw burnt (ZTSB)] and five K rates were 0, 20, 40, 60 and 80 kg ha-1 on cotton yield and K use efficiency. Results indicated that bolls/plant–1, weight per boll, seed cotton yields, ginning out turn and K agronomic efficiency were highest with 60-80 kg K ha–1. Interactions revealed that ZTSAS with 60-80 kg K ha–1 had higher bolls/plant, bolls weight, seed cotton yields and ginning out turn compared to ZTSB. K agronomic efficiency indices decreased with increasing K rate. ZTSAS with 20 kg K ha–1 gave greater K agronomic efficiency than other combinations. ZTSAS with 60-80 kg potassium per hectare may be a sustainable and environmentally safe strategy to enhance cotton yield and soil fertility .

Keywords: Zero tillage, residue management, potassium, cotton yield, K agronomic efficiency

DOI: 10.7176/CPER/64-03

Publication date: January 31st 2022

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ISSN (Paper)2224-7467 ISSN (Online)2225-0913

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