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相关性研究证实,内蒙西部平原地区冲积土有效磷的测定,最好的浸提液是olson的0.5M的NaHC_3。土壤有效磷与马铃薯吸磷量之间的相关系数是0.867(n=20)。通过校验试验,内蒙冲积土的肥力指标是: 肥力等级极低低中高极高土壤速磷(ppm)<2 2—5 5—12 12～20 >20 土壤速磷(x)与磷肥利用率(y)之间的相关系数是-0.567(n=20),其回归方程为y=24.7—5.691nx。根据土壤有效磷含量或产量指标得到了马铃薯磷肥用量的推荐。种肥比追肥侧施好,磷肥利用率提高10％,产量提高13—17％;带施优于撒施,磷肥利用率提高了％。
Correlation studies confirm that the determination of available phosphorus in the alluvial soil in the western plain of Inner Mongolia is the best of 0.5 的 NaHC_3 for olson. The correlation coefficient between soil available P and P uptake was 0.867 (n = 20). Through the verification test, the fertility indexes of alluvial soil in Inner Mongolia are as follows: Low level of fertility Low Medium High High Soil P (ppm) <2 2-5 5-12 12-20> 20 Soil Phosphorus (x) and P utilization (y) is -0.567 (n = 20), the regression equation is y = 24.7-5.691nx. According to soil available phosphorus content or yield indicators have been recommended for the use of potato phosphate. Fertilizers were better than the top dressing, phosphate fertilizer utilization rate increased by 10%, yield increased by 13-17%; with facilities better than spread, phosphorus utilization rate increased by%.