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在土壤通报1961年第6期刊登了山西省运城农业专科学校陈奇恩教师所写的“磷肥在石灰性土壤中变化规律试验初报”一文,引起了我们很大的兴趣。文中不少观点是我们同意的,并应在实践中加以运用。但是,我们也对文中的某些部分具有不同的看法。特在此提出和陈奇恩同志商榷,并请大家指正。 1.文中第一段是谈土壤温度的变化对磷肥可溶性影响。试验方法是将土壤分别置于20℃,25℃,30℃,35℃,40℃,45℃,50℃,55℃,60℃的水中浸泡半小时,取滤液测其含磷量。获得结论为温度愈高可溶性磷愈多。我们认为,以不同温度的水浸泡土壤代替不
In the Soil Bulletin No. 6 of 1961, we published an article titled “Preliminary Report on the Experiment of Variation of Phosphate Fertilizer in Calcareous Soil” written by Chen Qienan, a professor at Yuncheng Agricultural College in Shanxi Province, which aroused much interest. Many opinions in this article are what we agree with and should be used in practice. However, we also have different opinions on certain parts of the text. Special proposed here and Comrade Chen Qien discussion, and please correct me. 1. The first paragraph is about the impact of changes in soil temperature on the solubility of phosphate fertilizer. The test method is to soak the soil in 20 ℃, 25 ℃, 30 ℃, 35 ℃, 40 ℃, 45 ℃, 50 ℃, 55 ℃, 60 ℃ water for half an hour. It is concluded that the higher the temperature the more soluble phosphorus. We believe that soaking the soil with water at different temperatures does not replace it