A method for estimating nitrogen supply index in crop plants: case study on wheat

Abstract

This paper aim was to adapt a physiological parameter which reflects plant growth and productivity for wheat plants in relation with the applied nitrogen dose. This index can be used for various plants due to the fact that can be easy calculated and gives information about the status and requirements of diverse crops. Nitrogen is the most widely used chemical fertilizer and the adjustment of the dose is really important for farmers, who are searching for an optimum cost-benefit ratio. For this study, five experimental N doses were utilized, between 0 and 200 kg/ha. Experimental field was located within Didactic Station of BUASMV Timisoara, Romania. Nitrogen supply index was determined for healthy leaves and mathematical models were developed. The optimum N amount used for this study was 119 kg/ha and the analysis of differences reflected the modifications for doses ranging between 0 and 200 kg/ha.

Microbial Profile and Physico-chemical Analysis of the Excreta of Dendrocygna javanica and Anas platyrhynchos domesticus

“…Nitrogen is the major plant macronutrient and also the major constituent for protein, nucleic acid, vitamin and hormone, plants assimilate it in the form of nitrate. Nitrogen as fertilizer assure a greater crop productivity and is widely used worldwide for many plants (7) . Zhongping Qiu et al (8) performed a similar study in-chicken manure where nitrogen fixing bacteria converts more ammonia into total nitrogen.…”

Studies Regarding Wheat Leaves Investments in Relation With Nitrogen Supply

“…Leaves chlorophyll content is associated with the required nitrogen due to the fact that the amount of chlorophyll was significantly related with the nitrogen concentration in wheat plants and leaves, and thus using an appropriate nitrogen dose become an important tool for estimating wheat production (Schlichting et al, 2015;Akhter et al, 2016). Also, an index which describes the interconnection between specific leaf weight and ammonium nitrate dose (NSI -Nitrogen supply index), was previously described (Datcu et al, 2020). Thus, dividing this index, more exactly specific leaf weight, in organic and inorganic parts, resulting in a parameter named organic matter per surface (OMPS) became of interest.…”