Please use this identifier to cite or link to this item: http://prr.hec.gov.pk/jspui/handle/123456789/17920
Title: Effect of potassium humate and NPK on growth and yield of potato (Solanum tuberosum L. ) under agroclimatic Conditions of Multan
Authors: Idrees, Muhammad
Keywords: Biological & Medical Sciences
Botany
Issue Date: 2018
Publisher: Bahauddin Zakariya University Multan
Abstract: This study was carried out to investigate the effect of various combinations of different levels of NPK (0, 50, 75 and 100% recommended dose) and potassium humate (0, 4, 6 and 8 mg kg-1 of soil) on different growth and yield parameters, physiological attributes, and leaf mineral contents of potato, and also physico-chemical characteristics of the soil used for experiments. A pot experiment was conducted in wire-net house at the Institute of Pure and Applied Biology, Bahauddin Zakariya University Multan, during 2009.Fourfield experiments, two for each of autumn and spring crops were conducted during 2010-11 and 2011-12. Results revealed that application of NPK significantly increased plant growth in terms of number per hill, leaf chlorophyll content, leaf area, final plant height and fresh and dry weights of above and below ground parts. Physiological parameters such as rates of photosynthesis and transpiration, stomatal conductance and water use efficiency were improved steadily. Similarly, yield attributes i.e. tuber number, tubers yield, tuber dry weight, biological yield and harvest index were also increased significantly. Leaf minerals content (N, P, K, Mg and Ca) were positively affected by NPK application during vegetative growth and their maximum concentrations were found at 75 days after planting. However, sprouting percentage, number of aerial stems, leaf Na content, soil pH, soil EC and soil organic matter were not affected by the application of NPK. Soil application of K. humate significantly increased number of aerial stems per hill, leaf chlorophyll content, leaf area, final plant height and fresh and dry weights of above and below ground parts of potato plant. Steady improvement in all the studied physiological and yield parameters was obvious by the application of K. humate. Leaf N, P and K were also affected positively by K. humate application. However, sprouting percentage, number xi of leaves and tubers per hill, soil pH, soil EC and soil organic matter were not affected by the application of K. humate. Potato crop showed an economically positive response to the applied NPK and K. humate levels. The highest biological and economical yields were obtained at the application of 100% NPK recommended dose along with 8 mg K. humate kg-1 of soil (16 kg per hectare). However, the maximum BCR (benefit cost ratio) was computed in autumn crops when 75% of NPK recommended dose was applied in combination with 16 kg K. humate per hectare. While, spring crops resulted in the maximum BCR value at the application of full dose of NPK along with 16 kg K. humate per hectare. It indicates that the level of application of inorganic fertilizers for autumn crop of potato can be reduced by applying K. humate which is advantageous for soil health and is economical as well.
Gov't Doc #: 24043
URI: http://prr.hec.gov.pk/jspui/handle/123456789/17920
Appears in Collections:PhD Thesis of All Public / Private Sector Universities / DAIs.

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