The Effect of Precision Variable Fertilization on Wheat Based on Prescription Map

摘要

Precision fertilization is one of the important measure in precision agriculture. It carries out different fertilizer management according to the differences of soil nitrogen, The core of precision fertilization is to get the largest fertilizer efficiency. In this study, we carried out precision fertilization of wheat through the topdressing by intelligent spatial decision, which is based on the variability of soil fertility and spatial variability of production for many years to form prescription map which is to be set up in precision rate fertilizer applicator. The results showed that the yield coefficient of precision fertilization had a decrease of 1.08-1.23 percentage points and the precision fertilization which is decision-making based on spatial variability of soil fertility can save 9.82% of fertilizer than the farmer which uniform fertilization, it also can increase income by 227.35 Yuan per hectare. Variable fertilization can increase the content of chlorophyll during the green stage to the jointing stage, 2-3.79% for chlorophyll a; 2.3% for chlorophyll b.