Optimization of drip irrigation parameter combinations for salinized cotton fields

doi:10.6048/j.issn.1001-4330.2025.07.019

Abstract

Abstract:

【Objective】 To clarify the optimal drip irrigation parameter combinations for salinized cotton fields in Karamay, northern Xinjiang. 【Methods】 Two irrigation quotas (W₁: 52.5 mm, W₂: γh(S₀-S₁)/K mm) and four emitter flow rate × emitter spacing combinations (T₁: 1.4 L/h×20 cm, T₂: 2.0 L/h×30 cm, T₃: 2.4 L/h×30 cm, T₄: 2.7 L/h×30 cm) were set in the experiment and the interactive effects of these combinations on multiple indicators, including soil water-salt dynamics, crop growth, and yield, were analyzed. Meanwhile, multi-level weighting system was established using the Analytic Hierarchy Process (AHP) and the CRITIC weighting method to evaluate 11 indicators across three categories. Game theory-based combination weighting was applied to determine the final weights for single indicators. A fuzzy matter-element model was used to construct a comprehensive evaluation system for drip irrigation parameter combinations in salinized cotton fields. Furthermore, a mathematical model for soil water-salt interaction under different drip irrigation parameters was developed with the dual objectives of salinity control and high yield. 【Results】 Irrigation quota and emitter flow rate significantly affected salinity leaching efficiency, crop growth, and yield (P < 0.05). Increasing the leaching quota effectively enhanced root zone water content and salinity leaching efficiency. The optimal values for each indicator were observed under the W₂ irrigation quota, with trends showing an initial increase and subsequent decrease as the emitter flow rate increased. Among the treatments, T₂ outperformed T₃ in lower root zone salinity leaching efficiency and plant height. However, under the comprehensive evaluation system, T₃W₂ was identified as the optimal drip irrigation parameter combination. 【Conclusion】 The optimal irrigation volume and emitter flow rate to be 5,631 m³/hm² and 2.3 L/h, respectively.

Key words: water and salt; salinity leaching; drip irrigation parameters; cotton growth; comprehensive evaluation

摘要：

【目的】研究新疆北疆克拉玛依地区盐渍化棉田滴灌技术参数组合。【方法】设置2个灌水定额(W₁:52.5 mm、W₂:γh(S0-S1)/K mm),4个(滴头流量×间距)组合(T₁:1.4 L/h×20 cm、T₂:2.0 L/h×30 cm、T₃:2.4 L/h×30 cm、T₄:2.7 L/h×30 cm)。分析不同滴灌技术参数组合交互对棉花水盐、生长、产量多个指标的影响。采用AHP层次分析法和CRITIC权重法对3类因素11个指标进行多层赋权,运用博弈论的组合赋权法获得各单一指标最终权重,基于模糊物元模型建盐渍化棉田滴灌技术参数组合综合评价体系,并以控盐、高产为目标建立不同滴灌技术参数条件下的盐渍化棉田水盐交互响应数学模型。【结果】灌水定额和滴头流量对盐分淋洗效率、作物生长及产量影响显著(P<0.05)。增加淋洗定额可以有效提高根区含水率、盐分淋洗效率。各个指标最优处理均出现在 W₂ 灌水定额中,并随着滴头流量的增加呈现先增加后减小的趋势,其中 T₂ 处理仅在根区下层盐分淋洗效率、株高等指标上优于 T₃ 处理,在盐渍化棉田滴灌技术参数组合综合评价体系下, T₃W₂ 为最优滴灌技术参数组合。【结论】最优灌水量、滴头流量分别为5 631 m³/hm²、2.3 L/h。

关键词: 水盐, 盐分淋洗, 滴灌技术参数, 棉花生长, 综合评价

LUO Youyang, XIE Xiangwen, YANG Pengnian, Milixiati Minadola, XU Yongmei. Optimization of drip irrigation parameter combinations for salinized cotton fields[J]. Xinjiang Agricultural Sciences, 2025, 62(7): 1743-1754.

罗幼洋, 谢香文, 杨鹏年, 米力夏提·米那多拉, 许咏梅. 盐渍化棉田滴灌技术参数组合优选[J]. 新疆农业科学, 2025, 62(7): 1743-1754.

Figures/Tables 17

References 30

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土层深度 Soil depth (cm)	土壤颗粒含量Soil Particle Content(%)			土壤质地 Soil texture	土壤容重 Soil capacity (g/cm³)	田间持水率 Fruit holding rate in field(%)
土层深度 Soil depth (cm)	粘粒 Clay (<0.002 mm)	粉粒 Particle (0.002~0.05 mm)	砂粒 Sand (0.05~2 mm)	土壤质地 Soil texture	土壤容重 Soil capacity (g/cm³)	田间持水率 Fruit holding rate in field(%)
0~20	24.08	32	43.92	壤土	1.51	21.11
20~40	28.08	46	25.92	粘壤土	1.55	24.46
40~60	28.08	58	13.92	粘壤土	1.55	27.57
60~80	42.08	48	9.92	粉(沙)质粘土	1.48	27.24
80~100	52.08	36	11.92	粘土	1.59	23.5

土层深度 Soil depth (cm)	土壤颗粒含量Soil Particle Content(%)			土壤质地 Soil texture	土壤容重 Soil capacity (g/cm³)	田间持水率 Fruit holding rate in field(%)
土层深度 Soil depth (cm)	粘粒 Clay (<0.002 mm)	粉粒 Particle (0.002~0.05 mm)	砂粒 Sand (0.05~2 mm)	土壤质地 Soil texture	土壤容重 Soil capacity (g/cm³)	田间持水率 Fruit holding rate in field(%)
0~20	24.08	32	43.92	壤土	1.51	21.11
20~40	28.08	46	25.92	粘壤土	1.55	24.46
40~60	28.08	58	13.92	粘壤土	1.55	27.57
60~80	42.08	48	9.92	粉(沙)质粘土	1.48	27.24
80~100	52.08	36	11.92	粘土	1.59	23.5

处理 Treat- ments	灌水定额 Irrigation quota (mm)	滴头流量×滴头间距 Dropper flow× Dropper spacing (L/h)(cm)
T₁W₁	52.50	1.4×20
T₂W₁	52.50	2.0×30
T₃W₁	52.50	2.4×30
T₄W₁	52.50	2.7×30
T₁W₂	W₂=γh(S₀-S₁)/K	1.4×20
T₂W₂		2.0×30
T₃W₂		2.4×30
T₄W₂		2.7×30

处理 Treat- ments	灌水定额 Irrigation quota (mm)	滴头流量×滴头间距 Dropper flow× Dropper spacing (L/h)(cm)
T₁W₁	52.50	1.4×20
T₂W₁	52.50	2.0×30
T₃W₁	52.50	2.4×30
T₄W₁	52.50	2.7×30
T₁W₂	W₂=γh(S₀-S₁)/K	1.4×20
T₂W₂		2.0×30
T₃W₂		2.4×30
T₄W₂		2.7×30

生育期 Perild of duration	灌水次数 Irrigation times	灌水时段 Irrigation period (M/D)	W₁ (mm)	W₂ (mm)	灌前平均含盐率 Average salt content before irrgation(%)	脱盐标准 Desalination standard (%)
苗期 Seedling stage	1	6/1~6/2	30.00	83.62	0.48	0.30
苗期 Seedling stage	1	6/17~6/18	52.50	79.93	0.47	0.30
蕾期 Bud stage	2	7/3~7/4	45.00	69.30	0.45	0.30
蕾期 Bud stage	2	7/13~7/14	52.50	60.98	0.43	0.30
花铃期 Flowering and bolling stage	4	7/22~7/24	52.50	82.70	0.48	0.30
		7/31~8/1	52.50	67.91	0.45	0.30
		8/12~8/12	52.50	59.14	0.43	0.30
		8/28~8/29	52.50	59.60	0.43	0.30
合计Total	8	/	412.50	563.18