手指小米,一种重要的“营养谷物”和气候适应型作物,在钙质土壤中作为边缘作物种植。钙质土壤有机碳含量低,高pH值,结构差。这种情况导致作物的生产率低下。特定地点的养分管理(SSNM),专注于在需要作物时提供最佳营养,可以确保最佳生产并提高作物的养分和能源利用效率。此外,为这种作物开发适当的SSNM技术可以为养分管理实践提供新的见解,特别是钙质土壤。在2020年和2021年的雨季期间,RajendraPrasad中央农业大学博士在钙质土壤中进行了田间试验,普萨,印度。实验由8种处理组成,viz.control,氮(N)/磷(P)/钾(K)-缺失,75%,100%,和125%的推荐肥料剂量(RFD),根据GreenSeeker读数,100%推荐P和K+30kgha-1N作为基础+其余N。从这项研究中,据观察,基于GreenSeeker的SSNM导致了最大的谷物产量(2873kgha-1),净输出能量(96.3GJha-1),和N的农艺效率(30.6kgkg-1),P(68.9kgkg-1),和K(68.9kgkg-1)。与基于GreenSeeker的养分管理相比,应用125%RFD的产量降低了约7%。在基于GreenSeeker的养分管理下,与125%RDF下相比,记录的能源利用效率提高了约12%,养分利用效率提高了21-36%。N的土著用品,P,和钾分别为14.31、3.00和18.51kgha-1。因此,根据GreenSeeker读数,100%的推荐P和K+30kgha-1N作为基础+其余N可以提高产量,养分利用效率,石灰质土壤中手指谷子的能量平衡。
Finger millet, an important \'Nutri-Cereal\' and climate-resilient crop, is cultivated as a marginal crop in calcareous soils. Calcareous soils have low organic carbon content, high pH levels, and poor structure. Such a situation leads to poor productivity of the crop. Site-specific nutrient management (SSNM), which focuses on supplying optimum nutrients when a crop is needed, can ensure optimum production and improve the nutrient and energy use efficiency of crops. Moreover, developing an appropriate SSNM technique for this crop could offer new insights into nutrient management practices, particularly for calcareous soils. A field experiment was conducted during the rainy seasons of 2020 and 2021 in calcareous soil at Dr. Rajendra Prasad Central Agricultural University, Pusa, India. The experiment consisted of 8 treatments, viz. control, nitrogen (N)/phosphorus (P)/potassium (K)-omission, 75 %, 100 %, and 125 % recommended fertilizer dose (RFD), and 100 % recommended P and K + 30 kg ha-1 N as basal + rest N as per GreenSeeker readings. From this study, it was observed that the GreenSeeker-based SSNM resulted in the maximum grain yield (2873 kg ha-1), net output energy (96.3 GJ ha-1), and agronomic efficiency of N (30.6 kg kg-1), P (68.9 kg kg-1), and K (68.9 kg kg-1). The application of 125 % RFD resulted in ∼7 % lower yield than that under GreenSeeker-based nutrient management. Approximately 12 % greater energy use efficiency and 21-36 % greater nutrient use efficiency were recorded under GreenSeeker-based nutrient management than under 125 % RDF. The indigenous supplies of N, P, and K were found to be 14.31, 3.00, and 18.51 kg ha-1, respectively. Thus, 100 % of the recommended P and K + 30 kg ha-1 N as basal + rest N according to GreenSeeker readings can improve the yield, nutrient use efficiency, and energy balance of finger millet in calcareous soils.