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Response of Phenology, Growth and Productivity of Maize Hybrids to Integrated Potassium Management

Response of Phenology, Growth and Productivity of Maize Hybrids to Integrated Potassium Management

Muhammad Faheem Jan1*, Asad Ali Khan1, Waqas Liaqat1, Haseeb Ahmad1, Muhammad Dawood Ahmadzai1 and Wazir Rehan

1Department of Agronomy, The University of Agriculture Peshawar, Khyber Pakhtunkhwa, Pakistan; 2Agricultural Research Institute Tarnab Peshawar, Khyber Pakhtunkhwa, Pakistan.

mfaheemjan@aup.edu.pk 

ABSTRACT

Integrated application of nutrients from both organic and inorganic fertilizers is necessary for sustainable crop productivity. Field trial was performed at Agronomy Research Farm of The University of Agriculture Peshawar during summer 2016. Two factors were studied i.e. hybrids (DK-Garanon, Pioneer-3025, WS-666, and Pioneer-3164) and potassium ratios (Organic vs inorganic). The organic source includes poultry manure (PM) while inorganic source includes sulphate of potash (SOP). Potassium (K) was applied to field in such an arrangement that 100, 80, 60, 40, 20 and 0% K was obtained from the organic source and the remaining was balanced form inorganic source for supplying a total K of 80 kg ha-1. Randomized complete block design with split plot arrangement was used. Hybrids were allotted to main plots and K ratios to subplot. Analysis of the data showed that crop phenology, growth, and yield of maize were significantly affected by both hybrids and potassium ratios. Maize hybrids and potassium ratios did differ in crop phenology (days to emergence, tasseling, silking, and maturity) and crop growth (single leaf area, leaf area index, and plant height) which resulted in different grain yield. Among hybrids DK-Garanon gave highest value for all the studied parameters as compared to others hybrids. Similarly, in K ratios higher values for the studied traits were recorded in plots which were treated with K 40% from organic (poultry manure) and 60% from inorganic (sulphate of potash) sources. It can be concluded that application of K at the rate of 80 kg ha-1 from both organic and inorganic sources at the ratio of 40% organic + 60% inorganic respectively to hybrid DK-Garanon resulted in higher net return from maize in terms of yield.  

 

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Pakistan Journal of Agricultural Research

June

Vol. 32, Iss. 2, Pages 218-415

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