Effects of soil thickness and water-saving irrigation method on growth and yield of rice in cold region
2024
LU Chengyue | CAO Zhifu | ZHANG Wanfeng | XIN Haixia | YANG Shuqing
【Objective】 This paper is to explore the effect of different soil thickness and irrigation methods on rice growth in cold region. 【Method】 In 2020, a rice water-saving experiment was carried out in Yuan Longping Rice test Base, Keyou Front Banner, Ulanhot City, Xingan League. The experiment consisted of three soil thickness treatments: 15-20 cm (H1), 20-25 cm (H2) and 25-30 cm (H3), and two irrigation treatments: controlled irrigation (K) and conventional irrigation (CK). In each treatment, we measured the growth and yield of the rice. 【Result】 The plant height in the K treatment was lower than that in the CK. Compared to CK, the K treatment increased root length, stem diameter, effective panicle number per hole, thousand grain weight and the rice yield. Compared to H1, H2 and H3 increased rice yield by 30.49%-32.91% and 63.74%-76.33%, respectively. Compared to CK, the K treatment reduced total irrigation amount by 55.04%-56.84%, and increased irrigation water productivity by 1.55 to 1.86 times. Compared to H1, H2 and H3 increased the irrigation water productivity by 35.61% to 38.62% and 73.07% to 94.14%, respectively. 【Conclusion】 Irrespective of the irrigation methods, varying soil thicknesses exerted distinct effects on plant height, root length, stem thickness, effective panicle count per hole, and rice yield. Implementing controlled irrigation alongside a soil thickness of 25-30 cm significantly enhanced rice growth, improved water use efficiency, and boosted rice yield. These findings offer valuable guidelines for rice cultivation in cold regions.
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