选择性土壤改良耕作制度(SICS)对沙土热性质空间变异的影响

IF 2 4区 农林科学 Q2 AGRONOMY International Agrophysics Pub Date : 2022-09-16 DOI:10.31545/intagr/152122
B. Usowicz, J. Lipiec
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引用次数: 1

摘要

. 该研究旨在确定在一项为期3年(2016-2018)的研究过程中,随机施用的土壤改良种植制度对土壤导热系数、热容和热扩散率变异性的影响。田间试验包括对照和以下土壤改良种植制度:石灰化、豆科绿肥捕收作物、农家肥、石灰化+豆科捕收作物+农家肥加春燕麦(2017)和春小麦(2018)。诸如体积密度、含水量、土壤导热系数、热容和热扩散系数等参数已经确定。在实验室中测量了当前原位含水量、水饱和和干燥土壤状态下的热性能。2017年湿年豆科作物以绿肥、农家肥和石灰+豆科作物+农家肥为主的分区热物性增加,而2018年干年留茬后土壤改良系统效果不一致。以含砂量为辅助变量的交叉半变分法和克里格法的预测效果优于半变分法和克里格法。分形分析表明,不同热物性分区的数量主要受含水率和容重的影响。土壤热特性在饱和和干燥状态下的空间分布随着容重的增大而增大。
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Spatial variability of thermal properties in relation to the application of selected soil-improving cropping systems (SICS) on sandy soil
. The study aimed to determine the effect of randomly applied soil-improving cropping systems on the variability of soil thermal conductivity, heat capacity, and thermal diffusivity over the course of a 3-year (2016-2018) study. The field experiment included the control and the following soil-improving cropping systems: liming, leguminous catch crops for green manure, farm yard manure, and liming+leguminous catch crops+farmyard manure together with spring oats (2017) and spring wheat (2018). The parameters such as bulk density, water content, and values of soil thermal conductivity, heat capacity, and thermal diffusivity have been determined. The thermal properties were measured at the current water content in situ and in water-saturated and dry soil states in the laboratory. The thermal properties in the wet year of 2017 increased in the subareas with a predominance of leguminous catch crops for green manure, farmyard manure, and liming+leguminous catch crops+farmyard manure, whereas the soil-improving cropping systems effect was not consistent after stubble tilling in the dry year of 2018. Cross-semivariograms which used the sand content as an auxiliary variable and cokriging produced a better prediction than the semivariograms and kriging. The fractal analysis indicated that the number of subareas differing in thermal properties was mainly modified by water content and bulk density. The spatial spread of the soil thermal properties during the water-saturated and dry states increased in subareas with a higher bulk density.
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来源期刊
International Agrophysics
International Agrophysics 农林科学-农艺学
CiteScore
3.60
自引率
9.10%
发文量
27
审稿时长
3 months
期刊介绍: The journal is focused on the soil-plant-atmosphere system. The journal publishes original research and review papers on any subject regarding soil, plant and atmosphere and the interface in between. Manuscripts on postharvest processing and quality of crops are also welcomed. Particularly the journal is focused on the following areas: implications of agricultural land use, soil management and climate change on production of biomass and renewable energy, soil structure, cycling of carbon, water, heat and nutrients, biota, greenhouse gases and environment, soil-plant-atmosphere continuum and ways of its regulation to increase efficiency of water, energy and chemicals in agriculture, postharvest management and processing of agricultural and horticultural products in relation to food quality and safety, mathematical modeling of physical processes affecting environment quality, plant production and postharvest processing, advances in sensors and communication devices to measure and collect information about physical conditions in agricultural and natural environments. Papers accepted in the International Agrophysics should reveal substantial novelty and include thoughtful physical, biological and chemical interpretation and accurate description of the methods used. All manuscripts are initially checked on topic suitability and linguistic quality.
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