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通过谷子经济合理施用氮磷化肥的研究,在兴安盟目前的生产栽培条件下,氮磷化肥单独施用的效果,均随着土壤肥力的提高,增产效果降低。尿素一次施用,其最佳施肥期为播种后的52天,即拔节前的10天。尿素最佳用量与土壤碱解氮测定值呈极显著负相关,其对数方程为y=123.93-19.9103lnx,r=-0.9460;三料磷肥的最佳用量与土壤速磷的含量也呈极显著负相关,其对数方程为y=60.4129-14.4572lnX,r=-0.8949。根据氮磷速效养分含量把全盟土壤分为9级及各级尿素和三料的最佳用量及比例。为便于在生产上应用此研究成果,按基础产量把全盟耕地分成三种肥力水平,并提出各肥力水平的氮磷肥建议施用量和比例。
Through the economical and rational application of nitrogen and phosphorus fertilizers by millet, under the current production and cultivation conditions of Xinganmeng, the effect of applying nitrogen and phosphorus fertilizers alone was reduced with the increase of soil fertility and yield increase. Urea once, the best period of 52 days after sowing, that is, 10 days before the jointing. The optimum amount of urea and soil alkalized nitrogen measured values were significantly negatively correlated, the logarithmic equation for the y = 123.93-19.9103lnx, r = -0.9460; the best use of three fertilizer and soil phosphorus content was extremely Significantly negative correlation, the logarithmic equation for y = 60.4129-14.4572lnX, r = -0.8949. According to nitrogen and phosphorus quick-acting nutrient content of the League League soil is divided into 9 and all levels of urea and three the best dosage and proportion. In order to facilitate the application of this research result in production, the cultivated land of Alliance was divided into three kinds of fertility levels according to the basic yield, and the recommended application amount and proportion of nitrogen and phosphorus fertilization level were put forward.