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Efficacy of fertilizing method for different potash sources in cotton (Gossypium hirsutum L.) nutrition under arid climatic conditions.
PLOS ONE ( IF 2.9 ) Pub Date : 2020-01-24 , DOI: 10.1371/journal.pone.0228335 Mubshar Hussain 1, 2 , Ahmad Faizan Tariq 1 , Ahmad Nawaz 3 , Muhammad Nawaz 3 , Abdul Sattar 3 , Sami Ul-Allah 3 , Abdul Wakeel 4
PLOS ONE ( IF 2.9 ) Pub Date : 2020-01-24 , DOI: 10.1371/journal.pone.0228335 Mubshar Hussain 1, 2 , Ahmad Faizan Tariq 1 , Ahmad Nawaz 3 , Muhammad Nawaz 3 , Abdul Sattar 3 , Sami Ul-Allah 3 , Abdul Wakeel 4
Affiliation
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Precise choice of potassium (K) source and application method does matter for its cost-effectiveness. This study was aimed to evaluate the best source and method of K fertilizer application to improve cotton productivity and profitability under an arid climate. Three different K sources (KNO3, K2SO4 and KCl) were applied at 100 kg ha-1 by four methods, i.e. a) basal application, b) side dressing, c) fertigation and d) foliar application of 2% K2SO4. The highest productivity and profitability were recorded with K2SO4 applied as foliar application. Total boll weight per plant was similar in foliar applied K2SO4 and basal application of KNO3. Better boll opening in foliar applied K2SO4, perhaps, played decisive role for increased seed-cotton yield. For basal application and side dressing, KNO3 produced the highest seed-cotton yield, but the benefit cost ratio was better for foliar applied K2SO4. In crux, foliar application of K2SO4 might be opted to improve the seed cotton yield, fiber quality and net returns under the arid climate. However, soil K application through K2SO4 and/or KNO3 is essential to balance the K removal from soil.
中文翻译：
干旱气候条件下不同钾源施肥方法对棉花（Gossypium hirsutum L.）营养的影响。
精确选择钾 (K) 源和施用方法对其成本效益非常重要。本研究旨在评估钾肥施用的最佳来源和方法，以提高干旱气候下棉花的生产力和盈利能力。通过四种方法以 100 kg ha-1 施用三种不同的钾源（KNO3、K2SO4 和 KCl），即 a) 基施，b) 侧施，c) 灌溉施肥和 d) 叶面施用 2% K2SO4。叶面喷施 K2SO4 时，生产率和盈利能力最高。叶面喷施 K2SO4 和基施 KNO3 的单株总铃重相似。叶面喷施 K2SO4 后更好的吐絮可能对提高籽棉产量起到了决定性作用。对于基施和侧施，KNO3 的籽棉产量最高，但叶面喷施K2SO4的效益成本比较好。关键是，叶面喷施 K2SO4 可以提高干旱气候下的籽棉产量、纤维质量和净收益。然而，通过 K2SO4 和/或 KNO3 施用土壤钾对于平衡土壤中钾的去除至关重要。
更新日期：2020-01-26
中文翻译：
干旱气候条件下不同钾源施肥方法对棉花（Gossypium hirsutum L.）营养的影响。
精确选择钾 (K) 源和施用方法对其成本效益非常重要。本研究旨在评估钾肥施用的最佳来源和方法，以提高干旱气候下棉花的生产力和盈利能力。通过四种方法以 100 kg ha-1 施用三种不同的钾源（KNO3、K2SO4 和 KCl），即 a) 基施，b) 侧施，c) 灌溉施肥和 d) 叶面施用 2% K2SO4。叶面喷施 K2SO4 时，生产率和盈利能力最高。叶面喷施 K2SO4 和基施 KNO3 的单株总铃重相似。叶面喷施 K2SO4 后更好的吐絮可能对提高籽棉产量起到了决定性作用。对于基施和侧施，KNO3 的籽棉产量最高，但叶面喷施K2SO4的效益成本比较好。关键是，叶面喷施 K2SO4 可以提高干旱气候下的籽棉产量、纤维质量和净收益。然而，通过 K2SO4 和/或 KNO3 施用土壤钾对于平衡土壤中钾的去除至关重要。
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