ABSTRACT

Field experiments were conducted during 2016 and 2017 cropping system to evaluate the performance of polymer-coated urea (PCU) viz. neam coated urea (NCU) at different doses. The experiment was conducted at the University Seed Farm, Usman, Tarn Taran, Punjab, India. Treatments comprised of T₁ control, T₂; 100% NCU in 3 splits T₃ 100% PCU in 3 splits T₄; 100% PCU in 1 split, T₅; 75% PCU in 3 splits, T₆: 50% PCU in 3 splits. Results revealed that T₃ treatment had significantly higher grain yields than T₁, T_5, and T₆ during 2016 and then T₁, T₂, T_5, and T₆ during 2017, respectively. Coming over to straw yield, T₃ had significantly higher yields than T₁ and T₅ during 2016 and then T₁ during 2017, respectively. Among yield attributes viz. panicle length, fertility percentage, T₃ had significantly higher values than T₁, T₅ and T₆ and at par with rest during both years. 1000 grain weight of T₃ significantly higher values than T₁, T₂, T₅ and T₆ and at par with T₄ during both years. 100% NCU (3 splits) and 100% PCU (1 split) reported to have lower values of nutrient efficiency parameters viz. recovery efficiency (%), agronomic efficiency (kg N ha⁻¹) and physiological efficiency than 100% PCU (3 splits). Hence, 100% PCU (42% N) under three splits improves nutrient efficiency parameters and finally yields of low land rice crop in a sustainable manner.

摘要

在 2016 年和 2017 年种植系统期间进行了田间试验，以评估聚合物涂层尿素 (PCU) 的性能，即。不同剂量的 neam 包衣尿素 (NCU)。该实验在印度旁遮普邦塔恩塔兰乌斯曼大学种子农场进行。处理包括T ₁对照、T ₂；100% NCU 分 3 分 T ₃ 100% PCU 分 3 分 T ₄；100% PCU in 1 split, T ₅ ; 75% PCU 分 3 次分割，T ₆：50% PCU 分 3 次分割。结果表明，2016年T ₃处理的籽粒产量显着高于T ₁、T ₅和T ₆，然后是T ₁、T ₂、T ₅和 T ₆分别在 2017 年期间。就秸秆产量而言，T _{3 的}产量分别显着高于2016 年的T ₁和 T ₅以及2017 年的T ₁。在产量属性中，即。穗长、生育率、T _{3 的}值显着高于T ₁、T ₅和T ₆并且在这两年与静息期相当。千粒重 T _{3 的}值明显高于 T ₁、T ₂、T ₅和 T ₆且与 T ₄相当在这两年中。据报道，100% NCU（3 次分割）和 100% PCU（1 次分割）具有较低的养分效率参数值，即。恢复效率（%）、农艺效率（kg N ha ^-1）和生理效率高于 100% PCU（3 次分割）。因此，三个分割下的 100% PCU（42% N）以可持续的方式提高了低地水稻作物的养分效率参数和最终产量。