The effect of the rainfall on the nitrogen fertilizer schedule of maize in Jilin, China

Abstract

The traditional optimization maize nitrogen fertilizer schedule tends to be fixed, even in different meteorological year. Because different meteorological conditions will affect the use efficiency of nitrogen fertilizer, this method of fertilization will limit the yield of maize. Based on DSSAT crop model, this paper simulated the optimized nitrogen fertilizer schedule of maize in Central Jilin Province of China from 1973 to 1992 on the basis of verified DSSAT model. It was found that the optimized nitrogen fertilizer schedule in different meteorological years had significant differences, and this optimized nitrogen fertilizer schedule changed with different meteorological years could increase maize yield by 3.9% compared with the fixed optimized nitrogen fertilizer schedule. At the same time, there was a significant positive correlation between amount of nitrogen fertilizer and rainfall in the stages of sowing, VJ and VT. In these stages, the amount of nitrogen fertilizer should be increased with the increase of rainfall. After all, an optimized agrometeorological prediction method was proposed to provide a theoretical basis for the real-time optimization schedule of maize nitrogen fertilizer in the future.

Effects of Drip Irrigation and Top Dressing Nitrogen Fertigation on Maize Grain Yield in Central Poland

“…The results obtained by the authors indicate the possibility of using nitrogen fertigation in place of traditional fertilization to reduce expenditures and activities related to the need for additional passages of agricultural machines. Recent studies on the impact of fertigation on yielding and shaping the quality of maize grain have a dynamic character, which means they are focused on the ongoing control of macronutrient resources in the soil [63][64][65][66][67][68][69][70]. In these studies, the following factors are differentiated: treatment frequency, the size of fertilizer doses and doses of supplemented water, plant development stages, and the rate of fertilizer release.…”

Nutrient Cycling with Duckweed for the Fertilization of Root, Fruit, Leaf, and Grain Crops: Impacts on Plant–Soil–Leachate Systems

“…The elevated concentration in the first event implies that the young plants did not have adequate time to absorb the available NH 4 + -N before the first leaching event took place, and/or that the microorganisms could not completely nitrify the NH 4 + -N. A similar response of excess nutrient leaching is often observed in full-scale agriculture when rain events hit the cropland in the early stages of plant growth. Efforts are therefore being made in the scientific community to address this widespread problem by developing new approaches that optimize fertilizer application timing based on meteorological data [32,33].…”