Nutrient sufficiency levels for haskap (Lonicera caeruleaL.) using the boundary-line approach

Abstract

Adequate supply of plant nutrients is crucial for haskap plant growth and increased productivity. A study was carried out to determine the variability in haskap (Lonicera caerulea L. cv. Indigo Gem) plant characteristics in relation to soil and leaf tissue nutrient status. A total of 19 composite soil samples and corresponding plant leaf tissue samples were collected in 2016 from 12 locations in Nova Scotia. Plant parameters measured include growth rate, leaf size, leaf chlorophyll content, and visual observations. A boundary-line approach was used to determine nutrient sufficiency ranges in leaf tissues of 2.23%–2.96% for N, 0.22%–0.28% for P, 0.84%–1.32% for K, 1.63%–2.10% for Ca, and 0.14%–0.50% for Mg. Principal component and correlation analysis suggested a possible antagonistic interaction between leaf K and Mg. Negative associations were observed most frequently between Ca and Mg and other nutrients, especially K. Plant parameters such as bush volume, leaf size, and growth rate were closely related to soil and leaf K. Deficiencies in leaf tissue K and P were identified as potentially important factors limiting growth. Therefore, there is a need to adjust or balance the application of these nutrients. In conclusion, the sufficiency ranges derived can be used as a guiding principle in diagnosing the nutritional status of haskap cv. Indigo Gem on representative farms in Nova Scotia.

Potential nutrient-response curves and sufficiency ranges for ‘Prata-Anã’ banana cultivated under two environmental conditions

“…Leaf tissue analysis as a tool for assessing plant nutritional status has been widely used to improve fertilizer rate recommendations and crop management practices. Reference values are conventionally established in calibration tests in which genetic and environmental factors and the interplay between nutrients are controlled; however, the nutritional composition of plant tissues is highly influenced by several environment-and crop-related factors (Iheshiulo et al, 2019). Indiscriminate extrapolations of sufficiency ranges established in diverse environmental conditions may lead to inaccurate nutritional diagnoses; thus, determining site-and cultivar-specific sufficiency ranges is a preferable course of action.…”

“…Studies found in the literature report sufficiency ranges established by BLA for several crops including forage cactus (Blanco-Macías et al, 2010), papaya (Maia and Morais, 2016), sugarcane (Mccray et al, 2010), rubber tree (Njukeng et al, 2013), haskap (Iheshiulo et al, 2019) and eucalyptus (Lima Neto et al, 2020); however, studies on bananas are in short supply.…”

Response of Plant-Associated Microbiome to Plant Root Colonization by Exogenous Bacterial Endophyte in Perennial Crops

“…We also showed, that even though RF67 was isolated from perennial plant preferential to high acidic soils, the strain grew well on the plates with pH 7 typical for Haskap agricultural soils ( Iheshiulo et al, 2018 ) and colonize roots on medium with pH 5.7. Additionally, the initial isolation of the strain RF67 was done on MMNH4 medium with pH 7.…”

Critical levels and sufficiency ranges for leaf nutrient diagnosis by two methods in soybean grown in the Northeast of Brazil

“…They used 18, 17, 11, 14, and 11 intervals, from the 20 classes initially proposed, for N, P, K, Ca, and Mg, respectively, for the boundary line. However, Iheshiulo et al (2019) evaluated Lonicera caerulea with 5 to 7 intervals for the macronutrients N, P, K, Ca, and Mg, with R 2 values of 0.67 to 0.89.…”

“…Studies using diagnoses generated by the nutrient balance methods (DRIS × CND) have shown that CND is more accurate than DRIS (Parent et al, 2013); and sufficiency ranges by the boundary line method are closer to those by the CND methods (Vizcayno-Soto and Côté, 2004;Blanco-Macías et al, 2010). Studies have reported that the boundary line is a promising tool to understand soil properties and evaluate the nutritional status of agricultural crops (Guedes Filho et al, 2019;Iheshiulo et al, 2019).…”