摘要
[目的]为进一步完善水稻磷钾肥施肥指标体系,提出合理的磷钾肥用量。[方法]基于水稻"3414"试验结果分析,以养分丰缺指标法为基础,建立水稻磷钾丰缺指标。[结果]通过对扬州市邗江区2007—2013年31个水稻"3414"部分试验数据的分析,建立了水稻测土配方施肥指标体系中的磷、钾养分丰缺指标,分别建立了水稻有效磷、速效钾丰缺指标的数学模型为:y=16.669ln(x)+41.734(R2=0.7278**)、y=29.674ln(x)-53.392(R2=0.845 3**)。[结论]解决了水稻磷钾肥施肥指标体系的问题,提出了土壤有效磷、速效钾的低、中、高、较高4个等级体系,对水稻测土配方施肥指标的建立起着关键性的作用。
[Objective] The present study was conducted to further improve the phosphorus and potassium fertilization application index system for rice cultivation, and to propose the rational application amount of phosphorus and potassium. [Method] The index about phosphorus and potassium abundance condition in rice was established based on nutrient abundance and deficiency indices of standard method and the experimental results using variety ＂3414＂. [[Result] Through analyzing 31 experimental partial date conducting in the Hanjiang district, Yangzhou from 2007 to 2013, we established a index about phosphorus and potassium abundance condition in rice which was one important index of the index system of measuring soil fertilizer.Moreover, we respectively found the abundance index of mathematical model on available phosphorus and available potassium in paddy rice, i.e. y = 16.669ln（x） ＋41.734（R2=0.727 8＊＊） and y =29.674ln（x）-53.392（R2=0.845 3＊＊）. [Conclusion] The results could be essential to solve several problems on the phosphorus and potassium fertilization index system in rice. Meanwhile, the four grades system about soil available phosphorus and available potassium was proposed which played the key role in the establishment of formula fertilization by soil testing index of rice.
出处
《园艺与种苗》
CAS
2015年第2期43-45,共3页
Horticulture & Seed
关键词
水稻
有效磷
速效钾
丰缺指标
Rice Available phosphorus Available potassius
