Effects Of Small Terrain On Lime Purple Soil Fertilite's Factors In Hilly Area

The soil fertility quality research always is an important constituent in a soil work since long ago, the occurrence development of soil fertility quality and the soil parent material, the terrain environment have extremely important relationship. The purple soil as a unique kind of soil resources in our country , which protecting and improving purple soil fertilizer quality are the purple soil area realize the agricultural sustainable development material base, For the past purple soil study focused on the comparison of between the purple soil parent materials, and more focused on soil erosion to the terrain research, but the study of the small terrain of the purple of the quality of soil and fertility under the same parent material conditions was less. This article chooses the suining group parent material soil is the object of study, from the profile and terrain angle obtaining, separately carries on the analysis comparison to the profile level and the terrain spot, study the research fertilitie's factors and the terrain spot reciprocity, thus discovers the small terrain factor influence fertility factor, will provide the scientific basis for the next agricultural production and the scientific research. The main results are as follows:1 The distribution character of soil profile nutrient elements in different terrain spotIn the different terrain spot profile level nutrient elements distribution are different, in the top of slope, beside of organic matter and total copper reaches the extremely remarkable level (F=14.02**, n=12, F=40.53**, n=12) and total nitrogen reach the significance level (F=8.56*, n=12), other nutrient elements difference are not remarkable. In the slope waist place profile levels analysis, the contents of organic matter, total nitrogen, total phosphorus, alkaline hydrolysis nitrogen, available phosphorus and available zinc content difference reaches the level of significance, has not seen the extremely remarkable level. pH also reaches the extremely remarkable level in the profile level difference, its reason possibly is the artificial long time cultivation applies fertilizer and the rain water leaching, causes the soil pH to change, but in-depth soil pH close soil parent material, creates the difference big among the levels.2 Distribution of the nutrient elements in three kinds of terrainsThrough carries on the comparison to three terrain spot nutrient elements content, the contents of organic matter, total nitrogen, total phosphorus, total potassium, available phosphorus, available potassium, exchange quantity, total copper, total manganese and available copper increase gradually from the top of slope to toe of slope, but the variance analysis indicated three terrain spots eliminates except of total nitrogen and available copper difference to reach the significance level (F=5.94*, F=4.29*? n=12), other element difference is not remarkable. pH and available iron are reducing gradually from the top of slope to toe of slope; the variance analysis result is the difference is not remarkable. In three terrain spots, the contents of alkaline hydrolysis nitrogen, slow effect potassium, carbonate,total zinc, available zinc and available manganese show: the toe of Slope >the top of slope > the slope waist, in which available manganese and available zinc difference respectively reach the significance (F=5.56*, n=12) and extremely significance level(F=12.24**, n=12).Through to three parts of terrains department 19 soil nutrient target carries on the principal components analysis result to indicate that, in suining group growth reddish brown purple on ochre, in addition to the majority of elements are influence by the soil parent material, the micro-relief condition is also had certain influence to this kind of some soil targets, mainly displays in to total nitrogen, alkaline hydrolysis nitrogen, total manganese, available copper and available manganese, and other five aspects.3 Relationship between nutrient elements in three kinds of terrain spotsThe result of correlation analysis showed: In the massive elements, pH and organic matter, pH and total nitrogen, organic matter and total nitrogen, total nitrogen and alkaline hydrolysis nitrogen all have good correlations. in the three terrain spots, but in the slope waist and the toe of slope place, pH and organic matter, total nitrogen, total phosphorus, alkaline hydrolysis nitrogen, available phosphorus all have correlations, organic matter and total nitrogen, alkaline hydrolysis nitrogen, total nitrogen and alkaline hydrolysis nitrogen, available phosphorus; total phosphorus and available phosphorus;alkaline hydrolysis nitrogen and available potassium, slow effect potassium; available potassium and slow effect potassium have the correlation. In the trace elements, in top of slope and slope waist place, total copper and total iron, total manganese, available copper, available manganese, total iron and total manganese, total iron and available iron have correlation. In slope waist and toe of slope place total zinc and total iron; total copper and available iron all has correlations. In three kinds of terrain spots, trace element do not have common correlation. In the conventional element and in the trace element correlation does not have the common correlation; only in the slope waist and the toe of slope place total manganese and slow effect potassium have correlations.