T/XJSL 0008-2019 Abolished Group standards

T/XJSL 0008-2019 Evaluation method for biodegradable film in cotton fields in southern Xinjiang

Publish Date: 2019-12-01 Implement Date: 2019-12-30 For services related to genuine standard inquiry, procurement, translation, and other related services in China, please Contact Us

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Basic Information

Standard Code: T/XJSL 0008-2019

Standard Type: Group standards

Standard Status: Abolished

is_force_gb: no

CCS Name: -

ICS Name: Terminology (principles and coordination and cooperation)

Publish Date: 2019-12-01

Implement Date: 2019-12-30

Scope

Scope: This standard applies to the Yarkent River and Tarim River basins in Xinjiang, located on the eastern, western, northern, and southern edges of the Tarim Basin. The frost-free period is 160 days to 240 days, with an active temperature sum of 3,500℃ to 4,400℃ above 0℃, a continuous temperature above 15℃ of 155 days to 170 days, an average temperature of 24℃ to 27.5℃ in the hottest month, a temperature daily range of 12℃ to 17℃, annual sunshine duration of 2,500 hours to 3,000 hours, and a sunshine rate of 60% to 70%. It also applies to the evaluation of biodegradable mulch film applications in ecologically similar areas of northern Xinjiang or mainland cotton-growing regions. Main technical content: 1. Machine performance: Use local conventional mulch film applicators to evaluate whether the mulch film exhibits breakage or adhesion during normal operation, and assess whether it meets mechanical operation requirements. 2. Soil temperature: Measure soil temperature under the mulch film using a platinum resistance temperature sensor (probe, with an accuracy of ±0.3℃) and a data collection system. 3. Waterproofing performance of the mulch film: Use the water vapor permeability of the mulch film to reflect changes in soil moisture. 4. Cotton growth and yield: Count the number of seedling holes using the 1-meter ridge method to calculate the cotton seedling rate. 5. Emergence time: The number of days from sowing to when the emergence rate reaches 50%. 6. Key phenological stages: Determine the entry of more than 50% of cotton plants into the corresponding growth stage as the mark. 7. Field degradation performance of biodegradable mulch film: Divide the biodegradation stage and describe the degradation status. 8. Field exposure test