Effects of branch removal on water use of rain-fed jujube ( Ziziphus jujuba Mill.) plantations in Chinese semiarid Loess Plateau region

Chen, Dianyu; Wang, Youke; Wang, Xing; Nie, Zhenyi; Gao, Zhiyong; Zhang, Linlin

doi:10.1016/j.agwat.2016.10.010

Cited by 24 publications

(16 citation statements)

References 59 publications

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“…Although previous studies indicated that pruning of branches was indeed beneficial to the recovery of dried soil layer, there was no clear indication of the exact depth or degree of its recovery (Wei et al, 2014;Chen et al, 2016;Nie et al, 2017). In the present study, minor or moderate soil water deficit was observed under four pruning intensities.…”

Section: Discussioncontrasting

confidence: 66%

“…Stand transpiration accounted for over half of the total water consumption (Chen et al, 2016), thus, management measures are necessary to suppress plant transpiration and prevent soil desiccation. Pruning can be an effective way to reduce tree water use by changing the canopy architecture and reducing canopy leaf area, leading to an improvement in the soil water replenishment rate (Shelden and Sinclair, 2000;López et al, 2008;Hipps et al, 2014;Afonso et al, 2017).…”

Section: Discussionmentioning

confidence: 99%

“…Pruning narrows the xylem vessels in Senna spectabilis and reduces the rate of transpiration and water consumption (Namirembe et al, 2009). It reduces the dipping diameter of jujube plant, which in turn increases the soil water storage (Chen et al, 2016). Wei et al (2014) found a decline in the rate of sap flow in pruned jujube plants, compared with non-pruned plants, especially during the flowering and fruit enlargement periods.…”

Section: Introductionmentioning

confidence: 99%

“…Moreover, wedge shapes are observed to form in dead tissues at the cut surfaces of pruned grapes, which affect the properties of catheter and sieve tubes and cause a significant decline in the sap flow rate (Zhao, 2013). Many studies showed that pruning is an effective method for ensuring the normal growth of jujube under drought or water deficit conditions (Chen et al, 2016;Zhang et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

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Effect of pruning intensity on soil moisture and water use efficiency in jujube (Ziziphus jujube Mill.) plantations in the hilly Loess Plateau Region, China

Jin

Wang

et al. 2019

J. Arid Land

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Jujube (Ziziphus jujube Mill.) is a traditional economic forest crop and is widely cultivated in hilly areas of the Loess Plateau, China. However, soil desiccation was discovered in jujube plantations. Pruning is recognized as a water-saving method that can reduces soil water consumption. In this study, we monitored the jujube plots with control (CK), light (C 1), medium (C 2) and high (C 3) pruning intensities during the jujube growing period of 2012-2015 to explore the effect of pruning intensity on soil moisture and water use efficiency (WUE) of jujube plantations in the hilly Loess Plateau Region. The results showed that pruning is an effective method for soil water conservation in jujube plantations. Soil moisture increased with increasing pruning intensity during the jujube growing period of 2012-2015. C 1 , C 2 and C 3 pruning intensities increased soil water storage by 6.1-18.3, 14.4-40.0 and 24.3-63.3 mm, respectively, compared to CK pruning intensity. Pruning promoted soil moisture infiltration to deeper soil layer. Soil moisture infiltrated to soil depths of 240, 280 and >300 cm under C 3 pruning intensity, 220, 260 and 260 cm under C 2 pruning intensity, 200, 240 and 220 cm under C 1 pruning intensity, and 180, 200 and 160 cm under CK pruning intensity in 2013, 2014 and 2015, respectively. Soil water deficit was alleviated by higher pruning intensity. In 2013-2015, soil water change was positive under C 2 (6.4 mm) and C 3 (26.8 mm) pruning intensities but negative under C 1 (-20.5 mm) and CK (-40.6 mm) pruning intensities. Moreover, pruning significantly improved fresh fruit yield and WUE of jujube plants. Fresh fruit yields were highest under C 1 pruning intensity with the values of 6897.1-13,059.3 kg/hm 2 , which were 2758.4-4712.8, 385.7-1432.1 and 802.8-2331.5 kg/hm 2 higher than those under CK, C 2, and C 3 pruning intensities during the jujube growing period of 2012-2015, respectively. However, C 3 pruning intensity had the highest WUE values of 2.92-3.13 kg/m 3 , which were 1.6-2.0, 1.1-1.2 and 1.0-1.1 times greater than those under CK, C 1 and C 2 pruning intensities, respectively. Therefore, C 3 pruning intensity is recommended to jujube plantations for its economic and ecological benefits. These results provide an alternative strategy to mitigate soil desiccation in jujube plantations in the hilly Loess Plateau Region, which is critical for sustainable cultivation of economic forest trees in this region.

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Section: Discussioncontrasting

confidence: 66%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Effect of pruning intensity on soil moisture and water use efficiency in jujube (Ziziphus jujube Mill.) plantations in the hilly Loess Plateau Region, China

Jin

Wang

et al. 2019

J. Arid Land

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“…Our results showed that wet events in rainfed jujube plantations accounted for 81.3%–93.9% of the total days of jujube growing seasons in 2012, 2013, 2017 and 2018 (Figure 4a). However, there was severe deficit in soil water content in the 0‐ to 3‐m soil layer during jujube growing season (Chen et al, 2016). Soil water stress existed for long periods in the 0‐ to 1‐m soil layer (root layer), especially during jujube growing season and was difficult for the plants to absorb water by roots (Chen, Wang, Liu, Wei, & Wang, 2014).…”

Section: Discussionmentioning

confidence: 99%

Comparison of the performance of leaf wetness duration models for rainfed jujube (Ziziphus jujuba Mill.) plantations in the loess hilly region of China using machine learning

et al. 2020

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Leaf wetness duration (LWD) affects the ability of tree canopy to regulate ecohydrological processes. Jujube (Ziziphus jujuba Mill.) is one of the main plants with significant impact on water cycle process and flux characteristics in the Loess Plateau region of China. However, little is known about LWD in rainfed jujube plantations in the loess hilly region of China. For the causes of leaf wetness in rainfed jujube plantations, dew-only, rain and the combined scenario were investigated in terms of LWD and meteorological variables for the 2012, 2013, 2017 and 2018 jujube growing seasons. The results were as follows: The leaf wetness events occurred frequently, and the days of leaf wetness driven by dew-only and rain accounted for 88.3% of the total number of days in a regular jujube growing season. LWD driven by dew-only was significantly lower than that driven by rain (p < 0.05). The correlation between LWD and meteorological factors varied with different scenarios. In dewonly scenario, the four calibrated models (RH, DPD, CART and NN) accurately predicted LWD. In rain scenario, only the calibrated NN model performed well. In the combined scenario, the calibrated RH, CART and NN empirical models performed nearly equally; all well estimated LWD. On the basis of accuracy, practicability and variable count, the calibrated RH, NN and RH models for dew-only, rain and the combined scenario can reliably estimate LWD in rainfed jujube plantations in the loess hilly region of China.

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Thinning promoted the rejuvenation and highly efficient use of soil water for degraded Caragana korshinskii plantation in semiarid loessal regions

et al. 2022

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High‐density afforestation of single‐species causes soil desiccation and vegetation degradation, posing severe challenges for plant rehabilitation, survival and its sustainable soil water use in drought regions. We explored the eco–hydrological responses of density adjustment for a typical degraded Caragana korshinskii plantation on the Chinese Loess Plateau, using 2‐year field observations. The treatments included two thinning intensities [thinning one at an interval of one (T50) and two (T67) shrubs], three pruning intensities [pruning 25% (P25), 50% (P50), and 75% (P75) of branches], and a control treatment (CK). Results indicated that the total soil water storage (0–600 cm) in T50 and T67 was 14.1% and 17.0% higher than that in CK in 2020 (p < 0.05). Treatments T67 and P25 significantly affected the length, basal diameter, and biomass of stems compared with the CK. Moreover, canopy transpiration at the individual–scale in T67 was 43.5% and 37.6% higher in 2019 and 2020 than that in CK (p < 0.05). At the stand–scale, the canopy transpiration in T67 was reduced by 81.2% in 2019 and by 79.2% in 2020 compared with that in CK (p < 0.05), respectively. In 2020, the water use efficiency in T67 was 13.8% and 101.7% higher (p < 0.05) than that in CK and T50, respectively. These observations indicate that thinning the stand density by 67% (T67) promotes plant rejuvenation and improves highly efficient use of soil water for the excessively afforested C. korshinskii plantations on the Loess Plateau. Our findings will guide the rational management of overcrowded C. korshinskii plantations in similar dry regions.

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Effects of branch removal on water use of rain-fed jujube ( Ziziphus jujuba Mill.) plantations in Chinese semiarid Loess Plateau region

Cited by 24 publications

References 59 publications

Effect of pruning intensity on soil moisture and water use efficiency in jujube (Ziziphus jujube Mill.) plantations in the hilly Loess Plateau Region, China

Effect of pruning intensity on soil moisture and water use efficiency in jujube (Ziziphus jujube Mill.) plantations in the hilly Loess Plateau Region, China

Comparison of the performance of leaf wetness duration models for rainfed jujube (Ziziphus jujuba Mill.) plantations in the loess hilly region of China using machine learning

Thinning promoted the rejuvenation and highly efficient use of soil water for degraded Caragana korshinskii plantation in semiarid loessal regions

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