Based on the long-term field experiments,the relationships between soil nitrogen balance,nitrogen utilization efficiency(NUE) and soil nitrate were studied.The results show NUE of wheat is 30.9%-65.8%with an average of 53.6%,soil nitrate accumulation rate is 2.3%-44.1%with an average of 13.2%,and apparent nitrogen loss rate is 25.0%-42.7%with an average of 33.2%.In general,there is a positive correlation between nitrogen balance value and nitrogen fertilizer application rate,while the correlation for phosph...
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