Process information
| Key Data Set Information | |
| Location | XA-SAX-CN |
| Reference year | 2012 |
| Name |
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| Use advice for data set | When using data related to this LCA, consider the allocation of construction materials and energy over their respective lifespans: 15 years for general building materials, 5 years for PVC water pipes, 1 year for greenhouse films (3 years for plastic greenhouses), and 3 years for anti-cold films. Note that only energy consumption and CO2 emissions are considered for the production processes of insecticides and fungicides. Excluded are the production of agricultural machinery, transportation of crops to the market, and the consumption phase by end consumers. |
| Technical purpose of product or process | The solar and plastic greenhouses described are designed for the cultivation of vegetables, specifically tomatoes and watermelons. These structures optimize plant growth by providing a controlled environment, and they facilitate certain agricultural practices year-round. |
| Classification |
Class name
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Hierarchy level
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| General comment on data set | The study area is the suburb of Xi 'an, Shaanxi Province. The total annual solar radiation in this area is 4.81 MJ·m-2, the annual sunshine duration is 2163.8 h, the annual average temperature is 12.9 °C, the average precipitation is 630 mm, the average evaporation is 884 mm, and the frost-free period is 221 days. The solar greenhouse in this area belongs to the structure of earth wall and steel frame, and the vegetables are mainly tomatoes, and the farming method of planting two crops of tomatoes a year is used. Plastic greenhouses belong to steel frame structure, generally planting melons in early spring, and planting tomatoes in autumn. In this study, 10 solar greenhouses (all 6 m× 90 m) and 5 plastic greenhouses (all 9 m×110 m) were selected as research objects to investigate the material consumption in the construction and daily operation of solar greenhouses and plastic greenhouses. The input and output of tomato and watermelon production from July 2012 to June 2013 were recorded in detail. During this period, two crops of tomatoes were planted in each of the 10 solar temperature rooms, covering the shed in July 2012, planting in mid-August, harvesting in mid-November, pulling seedlings in mid-January and late 2013, planting the second crop of tomatoes in early February, harvesting began in early April and mid-mid-June, and the final harvest was in mid-late June. Five plastic greenhouses planted melons in mid-to-late March, harvested in mid-to-late May, pulled seedlings in mid-to-late June, planted tomatoes in mid-July, harvested in mid-to-late September, and pulled seedlings in late November. Soil disinfection and tilling should be carried out before planting. Organic fertilizer and phosphate fertilizer should be applied before planting. Topdressing fertilizer should be applied along with irrigation water, which is deep well water. |
| Copyright | No |
| Owner of data set | |
| Quantitative reference | |
| Reference flow(s) | |
| Functional Unit | 1000 kg tomatoes |
| Time representativeness | |
| Data set valid until | 2013 |
| Technological representativeness | |
| Technology description including background system | The data were obtained as averages from 10 solar greenhouses and 5 plastic greenhouses. Based on the typical service life of construction materials, the consumption of building materials and energy for constructing solar greenhouses and plastic greenhouses were calculated as the equivalent of one year of usage. The service life was assumed to be 15 years for general building materials, 5 years for PVC water pipes, 1 year for greenhouse films (3 years for plastic greenhouses), and 3 years for the anti-cold films (skirt films of plastic greenhouses). The annual consumption of building materials for plastic greenhouses was evenly allocated to tomatoes and watermelons. |
| Flow diagram(s) or picture(s) | |
Modelling and validation
Administrative information
Inputs and Outputs