1. Machine performance: Use local conventional laminating machines to perform mulching operations, evaluate whether the mulching film has fractures and adhesion when the laminating machine is running normally, and evaluate whether the mulching film meets the mechanical operation requirements. 2. Soil temperature: The soil temperature under the film is measured using a platinum resistance ground temperature sensor (probe, accuracy is ±0.3°C) matched with a data acquisition system. 3. Water barrier performance of the mulch film: The water vapor transmittance of the mulch film is used to reflect the soil moisture changes of the tested mulch films. 4. Cotton growth and development and yield and emergence rate: Use the 1-meter ridge method to count the number of seedling holes and calculate the cotton seedling rate. 5. Seedling emergence time: the number of days from sowing to when the seedling emergence rate reaches 50%. Key phenological period: It is marked when more than 50% of the cotton plants in the plot enter the corresponding growth period 6. Field degradation performance of biodegradable mulch film: division of biodegradation stages and description of degradation status 7. Degradation status of biomulch film 8. Field exposure test
T/XJSL 0008-2019 history
2019T/XJSL 0008-2019 Security Evaluation Criteria of Degradable Plastic Mulching Film in Cotton field in the South of Xinjiang