ABSTRACT

A field experiment was conducted during 2015–18 to study the effect of integrated use of lime, inorganic and organic manures on soil health and yield performance of elephant foot yam (Amorphophallus paenifolius L) – black gram (Vigna mungo L) system in an acid Alfisol of Eastern India. Significantly highest mean corm yield of elephant foot yam (22.72 t ha⁻¹), grain and haulm yields of black gram (7.33 and 23.87 q ha⁻¹, respectively) were recorded due to integrated application of lime + FYM + ½ NPK + MgSO₄. Graded doses of NPK showed a corm yield response of 29, 70 and 105% in elephant foot yam due to addition of 50, 100, and 150% of NPK over control, respectively. Among the organic sources, incorporation of vermicompost showed the highest corm yield (13.92 t ha⁻¹) with a yield response of 46% over control at par with neem cake (13.60 t ha⁻¹). The bio-chemical constituents in the corms of elephant foot yam were found highest due to integrated use of lime + FYM + ½ NPK + Borax. The soil fungi and actinomycetes were dominant in the soils and are involved in nutrient transformations. Highest dehydrogenase activity (0.521 µg TPF hr⁻¹ g⁻¹), fluorescein diacetate hydrolysis assay (0.709 µg TPF hr⁻¹ g⁻¹), and urease activity (142 µg NH₄-N g⁻¹ hr⁻¹) were observed due to integrated application of lime + FYM + ½ NPK + MgSO₄. Integrated application of lime, organic manure and half of the recommended doses of NPK in combination with secondary/micro nutrients not only sustains the soil quality but also enhanced the productivity of elephant foot yam – black gram cropping system in Alfisols.

摘要

在2015–18年间进行了田间试验，研究了在酸中综合使用石灰，无机和有机肥料对象脚山药（Amorphophallus paenifolius L）–黑克（Vigna mungo L）系统的土壤健康和产量表现的影响。印度东部的Alfisol。由于综合施用了石灰+ FYM +½NPK + MgSO ，大象脚山药的平均球茎平均产量最高（22.72 t ha ^-1），黑谷物的谷物和长茎产量（分别为7.33和23.87 q ha ^-1）。₄。NPK的分级剂量显示，由于比对照分别添加了50％，100％和150％的NPK，在象脚山药中的球茎产量响应分别为29％，70％和105％。在有机来源中，掺入ver粉玉米显示出最高的球茎产量（13.92 t ha ^-1），与印度over饼相比，产量响应高出对照46％（13.60 t ha ^-1）。由于综合使用石灰+ FYM +½NPK +硼砂，发现象脚山药的球茎中的生化成分最高。土壤真菌和放线菌在土壤中占主导地位，并参与养分转化。最高的脱氢酶活性（0.521 µg TPF hr ^-1 g ^-1），荧光素二乙酸酯水解测定法（0.709 µg TPF hr ^-1 g ^-1））和脲酶活性（142 µg NH ₄ -N g ^-1 hr ^-1），这是由于石灰+ FYM +½NPK + MgSO _4的综合施用所致。石灰，有机肥和NPK推荐剂量的一半的综合应用与次生/微量营养素的结合不仅维持了土壤质量，而且还提高了象草的产量-Alfisols中的黑克农作物种植系统。