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黄泛区农场位于河南省境内黄泛平原,所属耕地主要为石灰性浅色草甸土,其中沙质壤土占多数,是各种作物的主要栽培土壤.该种土壤的有效肥力状况如表1.由表1可见,我场土壤化学肥力不高,尤其有机质及速效磷较为贫乏.土壤中石灰含量较高.约为7.8%pH7.8—8.2.因此,研究过磷酸钙的施用效果,不只有其理论意义,也有一定的生产价值.数年来,我们陆续在棉、粮、油及绿肥作物中做了些小区试验,对过磷酸钙在生产中的应用问题作了初步研究.现分述于下.
The pan-pan farms are located in the Yellow River Plain in Henan Province, and the cultivated land belongs to calcareous meadow soil, of which the sandy loam is the majority and is the main cultivated soil for all crops. The effective fertility status of the soil is shown in Table 1 As can be seen from Table 1, the chemical fertility of soil in our field is not high, especially organic matter and available phosphorus is poor, and the content of lime in soil is relatively high, about 7.8%, pH7.8-8.2 Therefore, the effect of applying superphosphate is not studied Only in its theoretical significance, but also a certain value of production. Over the years, we have one after another in the cotton, grain, oil and green manure crops to do some experiments on the application of superphosphate in the production of a preliminary study. In the next.