Energy inputs and crop yield relationship in greenhouse tomato production
Energy inputs and crop yield relationship in greenhouse tomato production
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DOI：
10.1016/j.renene.2005.04.007
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发表时间：
2006-04
期刊：
影响因子：
8.7
通讯作者：
Selim Adem Hatirli;B. Ozkan;C. Fert
中科院分区：
文献类型：
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作者：
Selim Adem Hatirli;B. Ozkan;C. Fert
这项研究考察了土耳其安塔利亚省温室番茄生产的能源使用模式以及能源投入与产量之间的关系。这项研究中使用的数据是基于通过面对面调查从种植者那里收集的横断面数据。结果表明，柴油(34.35%)、化肥(27.59%)、电力(16.01%)、化学品(10.19%)和人力(8.64%)是能源消耗的主要来源。在被调查的养殖场中，平均产量约为16万公斤/公顷，能耗约为106716.2MJ/公顷。投入产出、比能和能量生产率分别为1.2、12380.3MJ/t和0.09 kg/MJ。结果表明，在产出投入比方面，小型农场比大型农场更有效率。建立了一个计量经济模型来估计能量投入对产量的影响。因此，番茄产量这一内生变量被认为是化肥、化学物质、机械、人类、灌溉用水和种子能量等外部变量的函数。实证结果表明，除种子能量外，所有外源变量对产量的贡献均达到显著水平。在所有具有统计意义的外生变量中，人类、化肥、水、化学品和机械的弹性排名。这些结果表明，土耳其温室产业严重依赖化石燃料。
This study examines energy use patterns and the relationship between energy inputs and yield for greenhouse tomato production in Antalya province of Turkey. The data used in this study were based on cross-sectional data collected from growers by using a face to face survey. The results revealed that diesel (34.35%), fertilizer (27.59%), electricity (16.01%), chemicals (10.19%) and human power (8.64%) consumed the bulk of energy. In the surveyed farms, average yield and energy consumption were calculated as around 160000kg/ha and 106716.2MJ/ha, respectively. The results also showed that output–input, specific energy and energy productivity were 1.2, 12380.3MJ/t and 0.09kg/MJ, respectively. The results implied that small size farms were more efficient than large ones in terms of output–input ratio. An econometric model was developed to estimate the impact of energy inputs on yield. Therefore, tomato yield, an endogenous variable was assumed to be a function of exogenous variables; fertilizer, chemicals, machinery, human, water for irrigation and seed energy. The empirical results indicated that all exogenous variables except seed energy were found statistically significant and contributed to yield. Among all statistically significant exogenous variables, human, fertilizer, water, chemicals and machinery were ranked in terms of elasticities. These results indicate that the Turkish greenhouse industry heavily depends on fossil fuels.