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关中(土娄)土中磷的形态,施用磷肥的肥效和影响肥效因子的研究,从60年代开始进行了大量工作,也提出过一些土壤磷素丰、缺指标,但有关(土娄)土对磷吸附的研究,见诸文献尚少。本文重点讨论关中(土娄)土吸附磷的一般特性。一、供试土样和研究方法一、供试土样为油(土娄)土,系本课题组肥料田间试验的小区土洋,采样深度均为0—20cm。选用74002、75001、80027等共十个。另采集了两个典型红油士自然剖面,分耕作层、犁底层、古耕层、粘化层、钙积层和母质巨六个土层。寨东点剖面依次用82001—82006表示;杜寨点剖面依次用82011—82016表示。四个主要层次的土壤理化测定结果(见表1)。
Since the 1960s, a great deal of work has been done on the forms of phosphorus in the soils of Guanzhong (Tu Lou), the fertilizer efficiency of applying phosphate fertilizers and the fertilizer effect factors. Some soil phosphorus fertilizers and lack of indicators have also been proposed. However, The study of phosphorus adsorption, see the literature is still small. This article focuses on the general characteristics of phosphorus adsorption in Guanzhong (Tu Lou). First, the test soil samples and research methods First, the test soil samples for the oil (Lou) soil, the group of fertilizers in the field test plot soil, sampling depth are 0-20cm. Choose 74002,75001,80027 and so a total of ten. In addition, two typical oil tankers were collected and divided into six subsoils: subsoil, plow, old plow layer, sticky layer, calcium layer and parent material. Walled east point section followed by 82001-82006 said; Duzhai point section followed by 82011-82016 said. Four main levels of soil physicochemical determination (see Table 1).