Greenhouse grapevine transpiration and water use efficiency under different water and nitrogen conditions*

2021 ◽  
Author(s):  
Siyu Zheng ◽  
Tieliang Wang ◽  
Xinguang Wei ◽  
Bo Li ◽  
Yikui Bai
Keyword(s):  
Water Use Efficiency ◽  
Water Use ◽  
Use Efficiency ◽  
Nitrogen Conditions

Does Elevated CO2 Affect the Physiology and Growth of Quercus Mongolica under Different Nitrogen Conditions?

2005 ◽  
Vol 277-279 ◽  
pp. 528-535
Author(s):  
Oh Hyun Kyung ◽  
Yeonsook Choung
Keyword(s):  
Water Use Efficiency ◽  
Elevated Co2 ◽  
Water Use ◽  
Physiological Activity ◽  
Photosynthesis Rate ◽  
Total Biomass ◽  
High Nitrogen ◽  
Quercus Mongolica ◽  
Use Efficiency ◽  
Nitrogen Conditions

The response of Quercus mongolica, one of the major tree species in Northeast Asia and the most dominant deciduous tree in Korea, was studied in relation to elevated CO2 and the addition of nitrogen to soil in terms of its physiology and growth over two years. Plants were grown from seed at two CO2 conditions (ambient and 700 µL L-1) and with two levels of soil nitrogen supply (1.5 mM and 6.5 mM). Elevated CO2 was found to significantly enhance the photosynthesis rate and water use efficiency by 2.3-2.7 times and by 1.3-1.8 times, respectively. Over time within a growing season, there was a decreasing trend in the photosynthesis rate. However, the decrease was slower especially in two-year-old seedlings grown in elevated CO2 and high nitrogen conditions, suggesting that their physiological activity lasted relatively longer. Improved photosynthesis and water use efficiency as well as prolonged physiological activity under high CO2 condition resulted in an increase in biomass accumulation. That is, in elevated CO2, total biomass increased by 1.7 and 1.2 times, respectively, for one- and two-year-old seedlings with low nitrogen conditions, and by 1.8 and 2.6 times with high nitrogen conditions. This result indicates that the effect of CO2 on biomass is more marked in high nitrogen conditions. This, therefore, shows that the effect of CO2 is accelerated by the addition of nitrogen. With the increase in total biomass, the number of leaves and stem diameter increased significantly, and more biomass was allocated in roots, resulting in structural change. Overall, the elevated CO2 markedly stimulated the physiology and growth of Q. mongolica. This demonstrates that Q. mongolica is capable of exploiting an elevated CO2 environment. Therefore, it will remain a dominant species and continue to be a major CO2 sink in the future, even though other resources such as nitrogen can modify the CO2 effect.

Effects of ridge tillage and mulching on water availability, grain yield, and water use efficiency in rain-fed winter wheat under different rainfall and nitrogen conditions

2018 ◽  
Vol 179 ◽  
pp. 86-95 ◽  
Author(s):  
Na Li ◽  
Chunju Zhou ◽  
Xiao Sun ◽  
Jianyuan Jing ◽  
Xiaoxiao Tian ◽  
...  
Keyword(s):  
Winter Wheat ◽  
Grain Yield ◽  
Water Use Efficiency ◽  
Water Use ◽  
Water Availability ◽  
Use Efficiency ◽  
Nitrogen Conditions ◽  
Ridge Tillage

Increasing intrinsic water-use efficiency over the past 160 years does not stimulate tree growth in southeastern China

2018 ◽  
Vol 76 (2) ◽  
pp. 115-130 ◽  
Author(s):  
G Guo ◽  
K Fang ◽  
J Li ◽  
HW Linderholm ◽  
D Li ◽  
...  
Keyword(s):  
Water Use Efficiency ◽  
Water Use ◽  
Tree Growth ◽  
Southeastern China ◽  
The Past ◽  
Intrinsic Water Use Efficiency ◽  
Use Efficiency

A comparative appraisal of urea super granule application in raised bed and prilled urea application in conventional planting for transplanted boro rice (Oryza sativa)

2016 ◽  
Vol 6 (1) ◽  
pp. 822-832
Author(s):  
Halim Mahmud Bhuyan ◽  
Most. Razina Ferdousi ◽  
Mohammad Toufiq Iqbal ◽  
Ahmed Khairul Hasan
Keyword(s):  
Water Use Efficiency ◽  
Water Use ◽  
N Fertilizer ◽  
Deep Placement ◽  
Prilled Urea ◽  
Planting Methods ◽  
Weed Infestation ◽  
Use Efficiency ◽  
Raised Bed ◽  
Boro Rice

Utilization of urea super granule (USG) with raised bed cultivation system for transplanted boro (winter, irrigated) rice production is a major concern now days. A field experiment was conducted in the chuadanga district of Bangladesh to compare the two cultivation methods: deep placement of USG on raised bed with boro rice, and prilled urea (PU) broadcasting in conventional planting. Results showed that USG in raised bed planting increased grain yields of transplanted boro rice by up to 18.18% over PU in conventional planting. Deep placement of USG in raised bed planting increased the number of panicle m-2, number of grains panicle-1 and 1000-grains weight of boro rice than the PU in conventional planting. Better plant growth was observed by deep placement of USG in raised bed planting compared to PU in conventional planting. Sterility percentage and weed infestation were lower on USG in raised bed planting compared to the PU in conventional planting methods. Forty seven percent irrigation water and application time could be saved by USG in raised bed planting than PU in conventional planting. Deep placement of USG in bed saved N fertilizer consumption over conventional planting. Water use efficiency for grain and biomass production was higher with deep placement of USG in bed planting than the PU broadcasting in conventional planting methods. Similarly, agronomic efficiency of N fertilizer by USG in bed planting was significantly higher than the PU broadcasting in conventional planting. This study concluded that deep placement of USG in raised bed planting for transplanted boro rice is a new approach to achieve fertilizer and water use efficiency as well as higher yield and less water input compared to existing agronomic practices in Bangladesh.

Effects of Irrigation Amount on Grain Starch Content, Starch Synthase Activity, and Water Use Efficiency in Wheat

2009 ◽  
Vol 35 (2) ◽  
pp. 324-333 ◽  
Author(s):  
Peng-Fei CHU ◽  
Zhen-Wen YU ◽  
Xiao-Yan WANG ◽  
Tong-Hua WU ◽  
Xi-Zhi WANG
Keyword(s):  
Water Use Efficiency ◽  
Water Use ◽  
Starch Content ◽  
Starch Synthase ◽  
Irrigation Amount ◽  
Grain Starch ◽  
Use Efficiency

Effects of Drip Irrigation Patterns on Wheat Yield and Water Use Efficiency in Heilonggang Region

2013 ◽  
Vol 39 (9) ◽  
pp. 1687 ◽  
Author(s):  
Zi-Jin NIE ◽  
Yuan-Quan CHEN ◽  
Jian-Sheng ZHANG ◽  
Jiang-Tao SHI ◽  
Chao LI ◽  
...  
Keyword(s):  
Water Use Efficiency ◽  
Water Use ◽  
Drip Irrigation ◽  
Wheat Yield ◽  
Use Efficiency ◽  
Irrigation Patterns

Effect of Planting Density on the Growth, Water Use Efficiency and Yield of Dry-farming Potato under Different Rainfall Year Types

2018 ◽  
Vol 44 (10) ◽  
pp. 1560
Author(s):  
Xian-Qing HOU ◽  
You-Wen NIU ◽  
Wen-Li WU ◽  
Jin-Peng XU ◽  
Long SHI ◽  
...  
Keyword(s):  
Water Use Efficiency ◽  
Water Use ◽  
Planting Density ◽  
Use Efficiency ◽  
Dry Farming
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