Abstract
Nitrogen uptake from various sources by plants capable of biological reduction of N2 in symbiotic systems with root nodule bacteria is influenced by many factors. The aim of the study was to examine the influence of the development stage and variety of pea (Pisum sativum L.) cultivated in years with different temperature and precipitation conditions on the dynamics of nitrogen uptake from the atmosphere (Ndfa), fertilizer (Ndff), and soil (Ndfs). Pre-sowing nitrogen fertilization with the 15N isotope and the isotope dilution method were used in the research. The highest rate of Ndfa uptake was noted between the three-internode stage and the stage of the first visible flower buds outside the leaves, while Ndff and Ndfs uptake was highest between the 4-leaf stage and the 3-internode stage. The lowest rate of Ndfa uptake was noted from sowing to the four-leaf stage, while Ndff and Ndfs uptake was lowest between the stage when 50% of pods were of typical length and full maturity. Nitrogen uptake from all sources was similar for all pea cultivars, but significantly depended on the variable temperature and precipitation conditions (years of the study).
Highlights
Leguminous plants are an extremely important element of crop rotations, leaving a valuable site for the succeeding plants: cereals, root crops, and industrial crops [1,2,3]
The most important benefit of leguminous plant cultivation is the enrichment of soil with nitrogen from the nitrogen fixation process, which is used by the succeeding crops [2,5]
This represents 70–80% of the total amount of nitrogen accumulating in the soil in the nitrogen fixation process by all microorganisms [9,10]
Summary
Leguminous plants are an extremely important element of crop rotations, leaving a valuable site for the succeeding plants: cereals, root crops, and industrial crops [1,2,3]. They can be important in addressing the need to reduce the negative effects of continual intensification of agricultural crop production by introducing sustainable production methods that maximize utilization of fertilizers and natural processes [2,4]. The amount of biologically reduced nitrogen as well as the percentage of N from symbiosis depends in part on, the genetic properties of the leguminous plant and its symbiont, the growth phase, environmental factors, and agro-technical treatments that directly affect nitrogenase activity [4,13,14,15,16]
Sign-in/Register to view highlights & summary 
Published Version (
Free)
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call