Effects of seedling dipping and foliar application of nano dap on growth, yield and economics of fine rice

Pub Date : 2023-12-31 DOI:10.3329/bjb.v52i4.70589

Meenakshi Attri, Neetu Sharma, Swati Mehta, Joysamuel Mecarty

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Abstract

A field experiment was conducted to assess the effect of seedling dipping and foliar application of phosphorus on growth, yield and economics of fine rice. The experimental results revealed that 75% recommended nitrogen, phosphorus and 100% recommended potassium + seedling dipping with nano di-ammonium phosphate @ 5 ml/litre + foliar spray with nano di-ammonium phosphate @ 4 ml/litre application recorded significantly higher growth, yield and yield attributes, which was statistically at par with, 50% recommended nitrogen, phosphorus +100% recommended potassium + seedling treatment with nano di-ammonium phosphate @ 5 ml/litre+ 2 foliar spray with nano di-ammonium phosphate each @ 4 ml/litre and @ 2 ml/litre and 100% recommended nitrogen, phosphorus and potassium. However, 50% recommended nitrogen, phosphorus +100% recommended potassium + seedling treatment with nano di-ammonium phosphate @ 5 ml/litre+ 2 foliar spray with nano nano di-ammonium phosphate each @ 4 ml/litre recorded significantly highest agro physiological efficiency. However, in terms of economics 75% recommended nitrogen, phosphorus and 100% recommended potassium + seedling dipping with nano di-ammonium phosphate @ 5 ml/litre + foliar spray with nano nano di-ammonium phosphate @ 4 ml/litre recorded highest net returns and benefit cost ratio. Bangladesh J. Bot. 52(4): 1025-1031, 2023 (December)

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秧苗浸种和叶面喷施纳米 Dap 对水稻生长、产量和经济效益的影响

进行了一项田间试验，以评估秧苗浸种和叶面喷施磷肥对水稻生长、产量和经济效益的影响。实验结果表明，75% 的氮磷推荐量和 100% 的钾推荐量 + 5 毫升/升的纳米磷酸二铵浸种 + 4 毫升/升的纳米磷酸二铵叶面喷施能显著提高生长、产量和产量属性、在统计学上，这与 50%的推荐氮、磷 +100% 的推荐钾 + 5 毫升/升的纳米磷酸二铵苗期处理 + 4 毫升/升和 2 毫升/升的纳米磷酸二铵叶面喷施以及 100%的推荐氮、磷和钾相当。然而，50%的氮、磷推荐量+100%的钾推荐量+纳米磷酸二铵（5 毫升/升）苗期处理+纳米磷酸二铵（4 毫升/升）2 次叶面喷施的农业生理效率明显最高。然而，就经济效益而言，75% 的氮磷推荐量和 100% 的钾推荐量 + 5 毫升/升的纳米磷酸二铵浸种 + 4 毫升/升的纳米磷酸二铵叶面喷施，都能获得最高的净收益和效益成本比。孟加拉国植物学报52(4):1025-1031，2023 年（12 月）

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