Response of spatial structure of cotton root to soil-wetting patterns under mulched drip irrigation

Li, Dongwei; Li, Mingsi; Shen, Xiaojun; Zhou, Xinguo; Sun, Hao; Zhao, Yulong; Chen, Wenjuan

doi:10.25165/j.ijabe.20201305.5790

Cited by 4 publications

(7 citation statements)

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“…With the aggravation of the water deficit, the coordination ability of roots to actively adapt to the environment decreases, resulting in the reduction in RL, RSA and RV, and the growth and development of roots are inhibited [19]. Li et al [8] showed that water stress inhibited the growth of cotton roots at the flowering and bolling stage, their RL, RSA and RV were significantly lower than those in normal water conditions and the root length and distribution ratio in the 0-40 cm soil layer were the most affected, resulting in the root being rooted and growing deep under the soil. This test result also reflected this feature.…”

Section: Discussionmentioning

confidence: 99%

“…When the soil moisture was 75% θf (field capacity), the root growth rate and final root weight were the largest, so was the appropriate water content for root growth; 90% θf of soil moisture exceeded the suitable range of soil moisture for cotton roots. When the soil moisture is between 60-75% θf and 75-90% θf, there is a certain water stress, which inhibits the growth of cotton roots at the flowering and bolling stage, and the root length, root surface area and root volume are significantly reduced compared with using an appropriate level of water [8]. Chen et al [9] believe that the activity centers of cotton roots in the soil layer are different during different periods.…”

Section: Introductionmentioning

confidence: 99%

“…Because the soil moisture ecology of filmless cotton was significantly different from that of film-covered cotton (abbreviated as filmed cotton) [11], the effect of the irrigation amount on the root system was quite different. At present, there are many studies on the growth and development, root characteristics and yield formation of cotton with film mulching under the control of irrigation amount, but less on cotton without film mulching [8,12]. Taking the main cultivar 'Zhong619' of filmless cotton in Southern Xinjiang as the material, this paper set five irrigation amounts of filmless cotton and one suitable irrigation amount of filmed cotton as the control treatment, and studied the spatial distribution characteristics of root growth and yield components of filmless cotton under drip irrigation in Southern Xinjiang under different irrigation amounts, so as to provide technical support for the scientific irrigation of filmless cotton in Southern Xinjiang.…”

Section: Introductionmentioning

confidence: 99%

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Effects of Different Drip Irrigation Rates on Root Distribution Characteristics and Yield of Cotton under Mulch-Free Cultivation in Southern Xinjiang

Wan,

Li,

Wang

et al. 2024

Water

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In order to study the effects of different irrigation amounts on the root characteristics and yield of cotton without film mulching (abbreviated as filmless cotton) under drip irrigation in Southern Xinjiang, five irrigation amounts of filmless cotton (300, 375, 450, 525 and 600 mm, represented by W1, W2, W3, W4 and W5) and one irrigation amount of cotton with film mulching (abbreviated as filmed cotton) (450 mm, represented by WCK) were set. The effects of irrigation amount on root length density (RLD), root surface area (RSA), root average diameter (RAD), root volume (RV), root weight density (RED) and yield of filmless cotton were analyzed. The results of the two-year experiment showed the following: (1) The indexes of cotton root growth reached the maximum at the flowering and bolling stage, and the growth of soil root in the periphery (30 cm from the main root) and the lower layer (40–60 cm soil layer) reached the peak at the flowering and bolling stages, respectively; (2) The average value of root growth index of film-free cotton in each treatment was W2 > W3 > W4 > W5 and W1. The RLD of W2 and W3 increased by 19.41–106.67% and 13.66–84.22% in the peripheral and lower soil layer, and the proportion of RSA in the peripheral and middle soil layer (20–40 cm soil layer) increased by 1.64–3.41% and 0.49–4.09% compared with other treatments. The RAD, RV and RWD after W2 treatment were relatively large at various distribution points in the soil, followed by W3 treatment; (3) The average root indexes of WCK were not significantly different from those of W3, but the indexes of the lower soil layer were the smallest, at only 29.18–66.84% of the average value of the non-film mulching treatment, while the root indexes of the surface layer (0–20 cm soil layer) and the surrounding soil were larger, with an increase of 11.43–102.17% and 29.60–111.57%, respectively, compared with the non-film mulching treatment; (4) The seed cotton yield of W3 was the highest in the non-film mulching treatment, reaching 4833.25 kg·hm−2, but was still lower than that of WCK by 27.79%. Conclusion: An appropriate water deficit is conducive to root growth and increases the uniformity of its distribution in the soil layer. The irrigation amount of 375–450 mm for filmless cotton in Southern Xinjiang can promote root growth, prevent senescence and increase yield, which can be used as a reference in production.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Effects of Different Drip Irrigation Rates on Root Distribution Characteristics and Yield of Cotton under Mulch-Free Cultivation in Southern Xinjiang

Wan,

Li,

Wang

et al. 2024

Water

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“…Following the completion of the reproductive stage in 2022-2023, undisturbed soil samples were collected from the 0-40 cm soil layer, the moisture contents of which were measured using a 1500F1 bar pressure plate extractor. A soil moisture characteristic curve was subsequently fitted using soil matrix suction as shown in Formula (2) (Li et al, 2020): S = 623695:54e −58:8961q…”

Section: Soil Matrix Suctionmentioning

confidence: 99%

Effects of water–nitrogen coupling on water and salt environment and root distribution in Suaeda salsa

Xu,

Liu,

et al. 2024

Front. Plant Sci.

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Understanding the spatial distribution of crop roots is crucial for effectively managing crop water and fertilizer. We investigate the effects of water–nitrogen coupling on the water–salt environment and root distribution in the root zone of S. salsa. Three irrigation levels were established, calculated according to 0.35 (W1), 0.50 (W2), and 0.65 (W3) of local ET0. The three nitrogen levels were 150 (N1), 250 (N2), and 350 (N3) kg·hm−2 in a complete combination design. With the augmentation of irrigation water and nitrogen application, the total root weight density of the root system of Suaeda salsa increased from 17.18×10-3 g·cm-3 to 27.91×10-3 g·cm-3. The distribution of soil water suction significantly influences the root distribution of Suaeda salsa in saline soil, causing a transition from a narrow deep type to a wide shallow type. Under the W2 irrigation level, soil water suction ranges from 1485.60 to 1726.59 KPa, which can provide water for S. salsa.it becomes feasible to attain the necessary water and salt environment for the growth and development of S. salsa, resulting in the attainment of maximum biomass, ash content, and salt uptake. No significant differences in the biomass, ash content, and salt uptake of S. salsa was noted between N2 and N3 nitrogen application levels (p > 0.05).The optimal irrigation volume and nitrogen application level were 0.50 ET0 and 250 kg·hm−2, respectively. The results of this study provide a scientific basis for the large-scale planting of S. salsa in extreme arid areas to improve and utilize saline wastelands.

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“…Mulched drip irrigation (MDI) has been shown as an effective in conserving water, controlling salinity, and ameliorating soil microenvironments, and is widely used in arid and semiarid regions (Rosegrant et al, 2015;Liu et al, 2017;Thidar et al, 2020;Guan et al, 2022), which combines mulching and DI to uniformly deliver water and nutrients to the root zone through DI tapes, using low-pressure pipes (Beaman and Dillon, 2018;Fan et al, 2018). MDI is a localized irrigation technique (Li et al, 2020) due to the technical characteristics of low-volume Li et al 10.3389/fmicb.2023.1291962 Frontiers in Microbiology 02 frontiersin.org and high-frequency irrigation. Cotton planting area has exceeded 2 × 10 6 ha under MDI as its increasing popularity of DI technology since 1996 in Xinjiang, China (Wang et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

Soil salinity is the main factor influencing the soil bacterial community assembly process under long-term drip irrigation in Xinjiang, China

Li,

Qiu,

Tian

et al. 2023

Front. Microbiol.

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Identifying the potential factors associated with the impact of long-term drip irrigation (DI) on soil ecosystems is essential for responding to the environmental changes induced by extensive application of DI technology in arid regions. Herein, we examined the effects of the length of time that DI lasts in years (NDI) on soil bacterial diversity as well as the soil bacterial community assembly process and the factors influencing it. The results showed that long-term DI substantially reduced soil salinity and increased soil bacterial diversity while affecting the soil bacterial community structure distinctly. Null model results showed that the soil bacterial community assembly transitioned from stochastic processes to deterministic processes, as NDI increased. Homogeneous selection, a deterministic process, emerged as the dominant process when NDI exceeded 15 years. Both random forest and structural equation models showed that soil salinity was the primary factor affecting the bacterial community assembly process. In summary, this study suggested that soil bacteria respond differently to long-term DI and depends on the NDI, influencing the soil bacterial community assembly process under long-term DI.

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Response of spatial structure of cotton root to soil-wetting patterns under mulched drip irrigation

Cited by 4 publications

References 0 publications

Effects of Different Drip Irrigation Rates on Root Distribution Characteristics and Yield of Cotton under Mulch-Free Cultivation in Southern Xinjiang

Effects of Different Drip Irrigation Rates on Root Distribution Characteristics and Yield of Cotton under Mulch-Free Cultivation in Southern Xinjiang

Effects of water–nitrogen coupling on water and salt environment and root distribution in Suaeda salsa

Soil salinity is the main factor influencing the soil bacterial community assembly process under long-term drip irrigation in Xinjiang, China

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