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首页> 外文期刊>African Journal of Biotechnology >Hysteresis of soil temperature under different soil moisture and fertilizer in solar greenhouse conditions
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Hysteresis of soil temperature under different soil moisture and fertilizer in solar greenhouse conditions

机译：日光温室条件下不同水分和肥料条件下土壤温度的滞后性

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摘要

Soil temperature is one of the important variables in spatial prediction of soil energy balance in a solar greenhouse. The objective of this study was to find a simple method to estimate the hysteresis of soil temperature under three soil moisture and two fertilizer levels in solar greenhouse conditions with tomato crop?(Lycopersicon esculentum?Mill). The results show that the soil moisture had no?significant?effects on the soil mean temperature and had?significant?effects on the soil?hysteresis. The mean soil temperature could not express the?relationship between the soil temperature and the air temperature?accurately due to the soil?hysteresis?existence, while the?correlation?between?the diurnal variations, air?temperature and soil temperature?could describe the soil?hysteresis. We applied the phase of?sinusoidal curve?to best approximate the?hysteresis effect?of soil temperatures. The soil hysteresis?increased with the increase of soil depth, and thehysteresis effect of?soil?temperature was more and more obvious with the increase of soil?moisture and the amount of fertilizer.?When forecasting the soil?hysteresis, we need to take into account, the change of the diurnal variations, soil?temperature, the amplitude?of soil temperature and initial?phase.
机译：在日光温室土壤能量平衡的空间预测中，土壤温度是重要的变量之一。本研究的目的是找到一种简单的方法来估计日光温室条件下番茄作物（Lycopersicon esculentum？Mill）在三种土壤水分和两种肥料水平下土壤温度的滞后性。结果表明，土壤水分对土壤平均温度无显着影响，对土壤滞后性有显着影响。由于土壤存在滞后性，平均土壤温度不能准确地表达土壤温度与气温之间的关系，而昼夜变化，气温和土壤温度之间的相关性可以描述土壤温度与气温之间的关系。磁滞现象我们应用“正弦曲线”相位来最好地近似土壤温度的“滞后效应”。土壤滞后性随土层深度的增加而增加，土壤温度的滞后作用随着土壤水分和肥料用量的增加而越来越明显。预测土壤滞后性时，需要采取以下措施：考虑到日变化，土壤温度，土壤振幅和初始相位的变化。

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