Morphology, Leaf Gas Exchange and Quality of Pegaga (Centella asiatica) under Different Nitrogen Fertilization Rates

Abstract

Aims: To investigate the physiological, leaf gas exchange and quality of Centella asiatica (pegaga) under different nitrogen fertilization rates. Study Design: Centella asiatica were exposed to four different nitrogen fertilization rates (0, 50, 100, 150 kg/ha) using urea (46% N) as nitrogen sources. The experiment was conducted in a randomized complete block (RCBD) design with three replications. Each treatment consisted of eight plants making the total of plants used in this study is 96 plants.

Growth, Carbon Assimilation and Biochemical Changes of Polygonum minus Huds as Affected by Nitrogen Fertilization

“…The establishment of t of N supply might be due to the elevated in the production of total nonstructural carbohydrates [69,70]. This finding was in a good compliance with the field study that was carried out by Liu et al [71], who proved that the high supply of N rates may conceal the production of flavonoids in Chrysanthemum morifolium due to the presence of L phenylalanine [20]. Since 50 kg N/ha gave the highest synthesis of flavonoids contents, hence, it can be deduced that 50 kg N/ha was the optimum rate in promoting the s flavonoids in P. minus.…”

“…Polygonum minus after twelfth weeks of planting Chrysanthemum due to the presence of Lphenylalanine [20]. Since 50 kg N/ha gave the highest synthesis of flavonoids contents, hence, it can be deduced that 50 kg N/ha was the optimum rate in promoting the synthesis of…”

“…Nitrogen is needed by the plant in the huge amount, which contains about 2% of plant dry matter and 16% of total plant protein. [20] suggested that the application of N fertilizer on the plants may double the crops production. The requisite amount of N supply in plants is one of the key factors in sustaining the production of crops since N is regarded as the indispensable element in the components of enzymes and proteins.…”

The Effect of Liquid Organic Fertilizer and Cattle Manure in Increasing the Biomass of Asiatic Pennywort (Centella asiatica L. Urb)

“…compared to controls. [13,14,17,18] also added that the application of macronutrients (N, P, K) significantly increased leaf production and leaf number of Gotu kola plants.…”

“…This finding is supported [16] Increases in the available nutrient content of rhizospheric soil after the application of liquid organic fertilizers has been attributed to the improved diversity of the microbial community, which enhances the nutrient cycle in the soil, increasing the soil nutrients available for plant growth. [17] reported that macro and micronutrients (N, P, K, Fe, Zn, Cu, Mn, S, Ca, and Mg) from 20% vermicompost were proven to increase leaf count by 120.78%. compared to controls.…”