[1]BAI Yonghong,GAO Zhiyong,WANG Youke,et al.Effects of Pruning Intensity on Water Consumption and Water Use Efficiency of Jujube Plantation[J].Research of Soil and Water Conservation,2018,25(04):206-214.
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Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
25
Number of periods:
2018 04
Page number:
206-214
Column:
Public date:
2018-06-13
- Title:
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Effects of Pruning Intensity on Water Consumption and Water Use Efficiency of Jujube Plantation
- Author(s):
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BAI Yonghong1, GAO Zhiyong2, WANG Youke3,4, MA Jianpeng3, NIE Zhenyi5, LU Jing2
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1. College of Natural Resources and Environment, Northwest A & F University, Yangling, Shannxi 712100, China;
2. Department of Water Conservancy, Yangling Vocational & Technological College, Yangling, Shaanxi 712100, China;
3. Institute of Soil and Water Conservation, CAS & MWR, Yangling, Shaanxi 712100, China
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- Keywords:
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pruning intensity; jujube; transpiration; soil moisture; dried soil layer
- CLC:
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S161.4;S152.7
- DOI:
-
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- Abstract:
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In order to explore the effect of pruning intensity on water consumption and water use efficiency of jujube plantation, plant height, crown width and total length of secondary branch were controlled. Four treatments of pruning intensity which varied from light to heavy levels, were conducted at the Mizhi Experimental station of the Northwest A&F University during the period from 2014 to 2016. Jujube growth was measured by using vernier calipers, measuring tape and balance, meanwhile Jujube sap flow was observed by TDP liquid flow measuring system, soil moisture of jujube plantation was determined by using neutron probe, and meteorological station was used to measure the meteorological factors. The results showed that: (1) pruned jujube trees could reduce the water consumption, the decrease of transpiration water consumption was beneficial to the rise of soil moisture in jujube plantation, therefore, it could alleviate the soil desiccation in jujube plantation; however, in different rainfall years, pruning had different effects on reducing water consumption of jujube trees, and it was more effective in the abundant rainfall year; (2) the transpiration of jujube under different pruning intensities was less (CV<10%); moderate pruning could better control the biomass of jujube branches and leaves, but had little effect on jujube fruit yield; and there was no significant difference for jujube yield of different pruning intensities, but water use efficiency of jujube trees increased significantly with the increase of pruning intensity, the average water use efficiency of jujube of pruning intensity 4 was 11.99% higher than that of intensity 1. The results of this study are critical for relieving soil desiccation, and improving water use efficiency for rainfed jujube plantation and rainfed economic forest on the Loess Plateau.