| Effects of irrigation quantity and irrigation frequency of dry sowing and wet seedling on soil compaction, water\|salt distribution and seedling emergence in cotton fields |
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| DOI：10.7606/j.issn.1000-7601.2022.06.11 |
| Key Words: cotton soil compaction soil water and salt distribution irrigation quantity irrigation frequency |
| Author Name | Affiliation | | ZHENG Ming | Xinjiang Institute of Water Conservancy and Hydropower Sciences, Urumqi, Xinjiang 830049, China
Key Laboratory of Saline\|alkali Soil Improvement and Utilization (Saline\|alkali Land in Arid and Semi\|arid Regions | | BAI Yungang | Xinjiang Institute of Water Conservancy and Hydropower Sciences, Urumqi, Xinjiang 830049, China
Key Laboratory of Saline\|alkali Soil Improvement and Utilization (Saline\|alkali Land in Arid and Semi\|arid Regions | | ZHANG Jianghui | Xinjiang Institute of Water Conservancy and Hydropower Sciences, Urumqi, Xinjiang 830049, China | | LIU Hongbo | Xinjiang Institute of Water Conservancy and Hydropower Sciences, Urumqi, Xinjiang 830049, China
Key Laboratory of Saline\|alkali Soil Improvement and Utilization (Saline\|alkali Land in Arid and Semi\|arid Regions | | WANG Bei | Xinjiang Institute of Water Conservancy and Hydropower Sciences, Urumqi, Xinjiang 830049, China | | XIAO Jun | Xinjiang Institute of Water Conservancy and Hydropower Sciences, Urumqi, Xinjiang 830049, China | | DING Yu | College of Hydraulic and Civil Engineering, Xinjiang Agricultural University, Urumqi, Xinjiang 830052, China | | HAN Zhengyu | College of Hydraulic and Civil Engineering, Xinjiang Agricultural University, Urumqi, Xinjiang 830052, China |
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| Abstract: |
| To investigate the effects of dry sowing and wet seedling on cotton soil compaction, soil water and salt distribution and seedling emergence, six treatments and a control treatment were set up with different emergence water and irrigation frequency, namely WP1 (675 m3·hm-2), WP2 (900 m3·hm-2), WP3 (1 125 m3·hm-2), WP4 \[(675+225) m3·hm-2\], WP5 \[(675+450) m3·hm-2\], WP6 \[(675+300+225) m3·hm-2\] and winter irrigation treatments. The indexes of topsoil cover slab, water content and salinity before and after irrigation, seedling emergence, plant height, and stem thickness for each treatment were measured. The results showed that the surface soil slump was affected by the total amount of irrigation water and the frequency of irrigation, and the WP4 treatment had the lowest surface soil slump (99.87 kPa), and a small amount of high\|frequency irrigation reduced the surface soil slump. The conductivity between the membranes was the highest for each treatment, being more than 9% higher than that of the narrow\|row soil. The highest seedling emergence (84.74%) was observed for the WP4 treatment. The narrow\|row conductivity, narrow\|row water content and top\|soil bulking all had significant negative correlations with seedling emergence, and soil water content and narrow\|row conductivity showed significant negative correlations with plant height and stem thickness. By evaluating the seedling emergence rate and growth index of each treatment, WP4 treatment was the best treatment. |
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