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依水定肥是一个施肥术语,就是依水的丰缺确定施肥量的多少,这已成为多年来人们的施肥习惯。近几年的研究表明,在一定的浇水条件下,粮田肥效的高低并不决定于浇水量的多少,即不同的浇水条件下,经济最佳施肥量是相同的。因此,在当前水资源短缺、化肥相对充足的情况下,在保证丰水粮田肥料投入的同时,适当增加缺水粮田的肥料投入,使其达到最佳施肥水平,是保单产,增总产,发挥土地潜力的重要措施。(这一结论与我省小麦专家、廊坊地区农科所研究员宁守铭同志等“以肥促根、以肥调水”的研究结论是一致的—编者) 通过五年的小麦——夏玉米、小
Fertilization by water is a term fertilization, that is, according to the abundance of water to determine the amount of fertilizer, which has become people’s fertilization habits over the years. In recent years, research shows that under certain watering conditions, the level of fertilizer efficiency in grain fields does not depend on the amount of watering, that is, under different watering conditions, the optimal economic fertilizer amount is the same. Therefore, under the current shortage of water resources and relative abundance of fertilizers, it is necessary to increase input of fertilizers in water-deficit grain fields while ensuring fertilizers input in grain-rich grain fields and to achieve the optimal fertilization level. Production, land potential to play an important measure. (This conclusion is consistent with the conclusion of the research conclusion that wheat experts in our province and Ning Shuming, a researcher in Langfang Agricultural Science Institute, “take fertilizer to promote root and fertilizer to adjust water” - through five years of wheat - summer maize ,small