Abstract

Nutrient efficiency concept is used to increase the overall performance of cropping system by providing economically optimum nutrition to the crop and at same time minimizing nutrient losses from the crop yield. The study was undertaken on the AICRP-IFS experiment located at BAU, Sabour having twelve treatments replicated four times in randomized block design. The data were taken after 34th cropping cycle. In this study, a modest initiative has been undertaken to assess the various nutrient use efficiencies for N, P, and K in rice-wheat under different integrated nutrient management (INM) treatments involving substitution of N by farm yard manure, wheat straw, and green manure along with levels of recommended doses of fertilizers and farmers’ practice. The results revealed that the overall AE, PE, APE, PFP, IUE, ARE, and partial nutrient balance (PNB) of N, P, and K for wheat crop was comparatively lower than that of rice crop which reflects that the residual effect of applied organic manures and fertilizers was more than the direct effect. PNB of crops for both the crops was near to 1 in INM plots which indicates that the yields and fertility status of soil is being sustained with respect N and P. However, K mining is being indicated through higher values of PNB for K. Overall, the results indicated that the integrated use of organic manures and inorganic fertilizers for last 34 years likely improved soil fertility, increased sustainable crop yield and uptake thereby led to increased nutrient use efficiency of applied nutrients and crops.

摘要

营养效率概念用于通过为作物提供经济上最佳的营养，同时最大限度地减少作物产量造成的营养损失，从而提高种植系统的整体性能。该研究是在位于 Sabour 的 BAU 的 AICRP-IFS 实验中进行的，该实验在随机区组设计中将 12 个处理重复 4 次。数据是在第 34 个种植周期后采集的。在这项研究中，我们采取了一项适度的举措来评估不同综合养分管理 (INM) 处理下水稻 - 小麦中 N、P 和 K 的各种养分利用效率，包括用农家肥、麦秸和绿肥以及推荐剂量的肥料和农民的做法。结果显示，总体AE、PE、APE、PFP、IUE、ARE、小麦的氮、磷、钾的部分养分平衡（PNB）低于水稻，说明施用有机肥和有机肥的残留效应大于直接效应。两种作物的 PNB 在 INM 地块中都接近于 1，这表明土壤的产量和肥力状况在 N 和 P 方面正在持续。然而，K 的开采是通过较高的 K 的 PNB 值来表明的。总体而言，结果表明，过去 34 年有机肥和无机肥料的综合使用可能提高了土壤肥力，增加了作物的可持续产量和吸收，从而提高了施用养分和作物的养分利用效率。小麦和水稻的钾相对较低，说明施用有机肥和化肥的残留效应大于直接效应。两种作物的 PNB 在 INM 地块中都接近于 1，这表明土壤的产量和肥力状况在 N 和 P 方面正在持续。然而，K 的开采是通过较高的 K 的 PNB 值来表明的。总体而言，结果表明，过去 34 年有机肥和无机肥料的综合使用可能提高了土壤肥力，增加了作物的可持续产量和吸收，从而提高了施用养分和作物的养分利用效率。小麦和水稻的钾相对较低，说明施用有机肥和化肥的残留效应大于直接效应。两种作物的 PNB 在 INM 地块中都接近于 1，这表明土壤的产量和肥力状况在 N 和 P 方面正在持续。然而，K 的开采是通过较高的 K 的 PNB 值来表明的。总体而言，结果表明，过去 34 年有机肥和无机肥料的综合使用可能提高了土壤肥力，增加了作物的可持续产量和吸收，从而提高了施用养分和作物的养分利用效率。