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Resource use indicators and carbon stocks in different genotypes and species of gladiolus for precision farming
Journal of Plant Nutrition ( IF 2.1 ) Pub Date : 2020-07-16 , DOI: 10.1080/01904167.2020.1793184
S. Sujatha 1 , T. Manjunatha Rao 1 , Rajiv Kumar 1 , T. R. Rupa 1
Affiliation  

Abstract The present study was carried out to quantify variations in growth, resource use indicators and carbon stocks in different genotypes and different species of Gladiolus for precision production practices. Growth, biomass and nutrient accumulation pattern, and physiological parameters showed significant variations among genotypes of Gladiolus hybrida and species of gladiolus. Leaf area was significantly higher in Arka Kum kum (1557.9 cm2 plant−1). Biomass accumulation was 54% of the total in above ground parts like leaf and spikes, and 46% in below ground corms. Among genotypes of G. hybrida, Arka Amar registered higher total biomass (8159 kg ha−1). Multiple regression indicated significant negative effect of leaf and spike weight on corm biomass (Y corm biomass=˗0.03013–1.0725leaf biomass˗0.4975spike biomass, R 2=0.98) was noticed. Nitrogen removal varied significantly among genotypes of G. hybrida (185–297 kg ha−1). There were marginal differences in P uptake (7.6–11.7 kg ha−1) both among genotypes and species. The potassium requirement was 200 kg K2O ha−1. Higher partial factor productivity and internal utilization efficiency and lower partial nutrient imbalance for P imply that P fertilizer application was more than nutrient demand. Gladiolus system is efficient in carbon sequestration and total carbon stocks in G. hybrida genotypes (19.81–21.63 t ha−1), Gladiolus callianthes (20.76 t ha−1) and Gladiolus psittacinus (22.65 t ha−1). The study indicated differences in nutrient acquisition capacity in genotypes and the need for precision nutrient application to reduce production cost. It is clear that adequate nutrient stocks in the non-harvestable parts are required for below ground corm biomass production.

中文翻译:

用于精准农业的唐菖蒲不同基因型和物种的资源利用指标和碳储量

摘要 本研究旨在量化不同基因型和不同种类唐菖蒲的生长、资源利用指标和碳储量的变化,以用于精确生产实践。生长、生物量和养分积累模式以及生理参数显示剑兰基因型和剑兰物种之间存在显着差异。Arka Kum kum(1557.9 cm2 植物-1)的叶面积显着更高。生物量积累在叶和穗等地上部分占总量的 54%,在地下球茎中占 46%。在 G. hybrida 的基因型中,Arka Amar 的总生物量更高(8159 kg ha-1)。多元回归表明叶重和穗重对球茎生物量有显着的负面影响(Y球茎生物量=˗0.03013–1.0725叶生物量˗0.4975穗生物量,R 2=0.98)。G. hybrida (185–297 kg ha-1) 基因型之间的氮去除差异很大。基因型和物种之间的磷吸收量(7.6-11.7 kg ha-1)存在边际差异。钾的需求量为 200 kg K2O ha-1。较高的部分要素生产率和内部利用效率以及较低的磷部分养分失衡意味着磷肥施用大于养分需求。唐菖蒲系统在 G. hybrida 基因型 (19.81–21.63 t ha-1)、Gladiolus callianthes (20.76 t ha-1) 和 Gladiolus psittacinus (22.65 t ha-1) 的碳固存和总碳储量方面是有效的。该研究表明基因型的养分获取能力存在差异,需要精确施用养分以降低生产成本。
更新日期:2020-07-16
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