Effect of Different Irrigation Patterns and Covering Methods on Soil Temperature of Onions Under Membrane Drip Irrigation

High fertilizer application and over-irrigation in sugarcane systems can cause considerable N2O emissions. Optimized water-fertilization management which reduces N2O emissions, while maintaining sugarcane biomass, is crucial, but may affect nitrogen fixation by sugarcane. This study evaluated the combined effect of water-fertilization on sugarcane biomass and nitrogen fixation in field trials in southern China. Treatments included drip and spray irrigation, with three levels (0% (low), 50% (medium), 100% (high)) of irrigation and of fertilizer. A rain-fed crop (no irrigation or fertilizer) was included as the control. The results showed that (1) spray irrigation with medium water and high fertilization increased biomass. The optimum combination in sugarcane elongation stage was drip irrigation with medium water and high fertilization, while drip irrigation with high water and high fertilization was the best choice for maturity stage. (2) For sugarcane nitrogen (δ15N) content, spray irrigation with medium water and high fertilization was the best combination in seedling and tillering stages. The optimum combination in the elongation stage was drip irrigation with medium water and high fertilization, and in maturity stage was drip irrigation with high water and high fertilization. (3) For soil (δ15N content), drip irrigation with high water and high fertilization proved optimal for seedling, tillering, and maturity stages. (4) In seedling stage, sugarcane (δ15N content) was found to be strongly correlated with leaf area index, soil water, soil temperature, and soil electrical conductivity. Soil (δ15N content) was correlated with photosynthesis and soil temperature. In conclusion, drip irrigation appears most suitable for field planting, while the best treatment in seedling and tillering stages is medium water-high fertilization, and that the best in elongation stage is high water-medium fertilization. The optimum water-fertilizer combinations identified here can provide a scientific basis for optimization and management of irrigation and fertilization in China and other regions with similar environments.

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Effects of drip irrigation on canopy and soil temperature, leaf gas exchange, flowering and nut setting of mature coconut (Cocos nucifera L.)

Journal of the National Science Foundation of Sri Lanka ◽

10.4038/jnsfsr.v36i1.131 ◽

2008 ◽

Vol 36 (1) ◽

pp. 33 ◽

Cited By ~ 3

Author(s):

A Nainanayake ◽

CS Ranasinghe ◽

NA Tennakoon

Keyword(s):

Gas Exchange ◽

Soil Temperature ◽

Drip Irrigation ◽

Leaf Gas Exchange ◽

Cocos Nucifera ◽

Cocos Nucifera L

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Effect of Different Irrigation Patterns and Covering Methods on Onion Water Consumption Characteristics

IOP Conference Series Earth and Environmental Science ◽

10.1088/1755-1315/643/1/012124 ◽

2021 ◽

Vol 643 ◽

pp. 012124

Author(s):

Haoliang Deng ◽

Peng Wang ◽

Hengjia Zhang ◽

Rang Xiao ◽

Yongling Zhang ◽

...

Keyword(s):

Water Consumption ◽

Covering Methods ◽

Irrigation Patterns

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Effects of Biochar Application and Irrigation Methods on Soil Temperature in Farmland

Water ◽

10.3390/w11030499 ◽

2019 ◽

Vol 11 (3) ◽

pp. 499 ◽

Cited By ~ 4

Author(s):

Yanhong Ding ◽

Xiaoyu Gao ◽

Zhongyi Qu ◽

Yonglin Jia ◽

Min Hu ◽

...

Keyword(s):

Soil Temperature ◽

River Water ◽

Drip Irrigation ◽

Field Experiments ◽

Yellow River ◽

Soil Depth ◽

Deep Soil ◽

External Temperature ◽

Irrigation Methods ◽

Soil Temperatures

Soil temperature plays a vital role in determining crop yield. Excessive irrigation may result in low soil temperature and a waste of water resources. In this paper, field experiments were carried out to evaluate the influence of irrigation methods and biochar application on soil temperature. The experiment included six treatments: (a) YB: biochar application in border irrigation with Yellow River water; (b) GB: biochar application in border irrigation with groundwater; (c) DB: biochar application in drip irrigation with groundwater; (d) Y(CK): border irrigation with Yellow River water; (e) G(CK): border irrigation with groundwater; (f) D(CK): drip irrigation with groundwater. The results are as follows: coupling drip irrigation and biochar, soil temperature increased by 1.20–3.87%. In the biochar application in border irrigation with Yellow River water and groundwater, soil temperature increased by 0.80–2.40% and 1.01–5.15%, respectively. Biochar is a medium for reducing the heat exchange of soil and atmosphere, as it hinders bi-directional heat movement. This mechanism was especially apparent at a 0–10 cm soil depth in the treatments of border irrigation using Yellow River water and groundwater. Biochar may help stabilize the fluctuation of soil temperature and improve the soil accumulated temperature. The effect of drip irrigation at 5–10 cm depth, border irrigation using the groundwater and the Yellow River water was great on soil temperatures above the 10 cm level but less on deep soil temperatures. After applying biochar to soil, the soil temperature was more sensitive to external temperature changes, such as air temperature and water temperature. Therefore, in the Hetao irrigation area, applying a proper amount of biochar to farmland soil was shown to improve the water and heat environment and improve the effectiveness of traditional border irrigation in synchronizing water and heat, especially under the drip irrigation condition. The results here suggest that using biochar under drip irrigation can promote growth and increase yield.

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