波兰土壤条件下Mehlich 3萃取剂测定土壤微量元素缺乏症极限值的研究进展。第二部分。油菜籽

IF 1.4 Q4 SOIL SCIENCE Soil Science Annual Pub Date : 2019-12-01 DOI:10.2478/ssa-2019-0029
E. Stanisławska-Glubiak, J. Korzeniowska, W. Lipiński
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引用次数: 2

摘要

摘要本研究的目的是建立土壤中微量元素低浓度的极限值,利用Mehlich 3萃取剂测定土壤中微量元素的浓度,以评估油菜作物中微量元素的缺陷。这些数值是根据1944年覆盖整个波兰的油菜籽田编制的。2017年,波兰农化实验室的采样人员在BBCH 30/31阶段采集了土壤样品和相应的植物样品。测定了植物样品中微量元素的浓度,测定了土壤样品中除微量元素外的pH值、质地、有机碳和速效磷的浓度。此外,还收集了每块地的油菜籽产量数据。极限值由两种独立的方法确定:1)回归方程法和2)所谓的高产法。在第一种情况下,根据描述R/G生物积累系数与特定土壤特征之间关系的方程计算土壤中微量元素的极限浓度(n=1944)。生物积累系数是植物中微量元素的浓度(R)与土壤中微量元素的浓度(Mehlich 3 (G)法)之商。将植物中微量元素的临界浓度(R)代入方程,然后对方程进行适当的转换,计算出极限值。第二种方法是从整个数据集中分离出一组产量≥4.0 t ha - 1的高产作物(n=755)。然后计算该组Mehlich 3提取液中土壤中各微量元素浓度的下五分位数(QU1),作为极限值。研究发现,QU1是土壤中微量元素最低浓度的一个很好的指标,在该浓度下可以获得至少4.0 tha - 1的产量。将方程和高产法计算的极限值求平均值,并进行适当的修正,得出最终极限值。在小麦和油菜籽联合采集的土壤样品(n=3865)中,分别通过评估油菜和小麦土壤微量元素短缺的百分比来检验这些值。将该评价结果与未考虑植物种类的1 M HCl评价方法进行了比较。
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Development of the limit values of micronutrient deficiency in soil determined using Mehlich 3 extractant for Polish soil conditions. Part II. Rapeseed
Abstract The aim of the study was to develop limit values for low microelement concentration in the soil, determined with the use of Mehlich 3 extractant for assessing their deficits in rapeseed crops. The values were prepared on the basis of 1944 fields with rapeseed, covering the whole Poland. In 2017, the samplers of Polish agro-chemical laboratories took soil samples and corresponding plant samples at the BBCH 30/31 stage. In the plant samples, the concentration of microelements was determined, and in the soil samples, apart from microelements, also pH, texture and the concentration of organic carbon and available phosphorus, were determined. Moreover, for each field, data on rapeseed yield were collected. Limit values were determined by two independent methods: 1) the method of regression equations and 2) the so-called high yield method. In the first case, the limit microelement concentration in the soil was calculated from the equation describing the relationship between the R/G bioaccumulation coefficient and a specific soil feature (n=1944). The bioaccumulation coefficient is a quotient of the concentration of a microelement in a plant (R) and its concentration in the soil determined by the Mehlich 3 (G) method. Limit values were calculated after substituting the critical concentration of microelements in the plant (R) to the equation, and subsequently, an appropriate conversion of the equation. The second method was based on the separation of a group of high yields ≥4.0 t ha−1 (n=755) from the whole data set. Then in this group, the lower quintiles (QU1) were calculated for the concentration of individual microelements in the soil determined in Mehlich 3 extract and adopted as limit values. It was found that QU1 is a good indicator of the lowest microelement concentration in the soil at which a yield of at least 4.0 t ha−1 can be obtained. The final limit values were worked out by averaging the values calculated by the equations and high yield method and their appropriate correction. In the combined soil sample collections for wheat and rapeseed (n=3865), the values were checked by evaluating the percentage of soils with microelement shortage separately for rape and wheat. The results of this evaluation were compared with the evaluation using the old system based on the 1 M HCl, which did not take into account the plant species.
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来源期刊
Soil Science Annual
Soil Science Annual SOIL SCIENCE-
CiteScore
2.50
自引率
6.70%
发文量
0
审稿时长
29 weeks
期刊介绍: Soil Science Annual journal is a continuation of the “Roczniki Gleboznawcze” – the journal of the Polish Society of Soil Science first published in 1950. Soil Science Annual is a quarterly devoted to a broad spectrum of issues relating to the soil environment. From 2012, the journal is published in the open access system by the Sciendo (De Gruyter).
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