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近年来在渤海地区的盐硷荒地上,开垦了大量的稻田,对于磷肥的施用问题,迫待明确。1958年我们在天津良王庄初步进行了一些磷肥肥效观察试验,表现效果良好。1959年又正式继续试验,结果证明增产仍是十分显著,按此处土壤分析:0--30厘米含速效磷为1--6.8P.P.M.;垒磷0.053％;含氮量0.0679％,地下水位很高,一般在1米左右。土壤为粘性盐硷土,上长马鞭和小苇子等杂草,试验地为新开种过一年的稻田。试验处理分为:
In recent years, a large number of paddy fields have been reclaimed in the saline-alkali wasteland in the Bohai Sea area. The issue of application of phosphate fertilizer is awaited. In 1958, we carried out some preliminary experiments on phosphate fertilizer efficiency in Liangwangzhuang, Tianjin, which performed well. 1959 and formally continue the test, the results show that the increase is still very significant, according to the soil analysis here: 0 - 30 cm with available phosphorus for the 1-6.8PPM; base phosphorus 0.053%; nitrogen content of 0.0679%, the water table is very High, usually about 1 meter. Soil as sticky saltine soil, on the long whips and small reeds and other weeds, to test the newly planted paddy field for a year. Test treatment is divided into: