Photosynthetic characteristics and water use efficiency of three coastal dune plants

1990 ◽  
Vol 5 (3) ◽  
pp. 377-391 ◽  
Author(s):  
Shin-ichi Ishikawa ◽  
Takehisa Oikawa ◽  
Akio Furukawa
Keyword(s):  
Water Use Efficiency ◽  
Water Use ◽  
Photosynthetic Characteristics ◽  
Coastal Dune ◽  
Coastal Dune Plants ◽  
Use Efficiency ◽  
Dune Plants

scholarly journals Subsoiling Improves the Photosynthetic Characteristics of Leaves and Water Use Efficiency of Rainfed Summer Maize in the Southern Huang-Huai-Hai Plain of China

Agronomy ◽  
2020 ◽  
Vol 10 (4) ◽  
pp. 465
Author(s):  
Wenming Wu ◽  
Shiji Wang ◽  
Lin Zhang ◽  
Jincai Li ◽  
Youhong Song ◽  
...  
Keyword(s):  
Water Use Efficiency ◽  
Water Use ◽  
Intercellular Co2 Concentration ◽  
Soil Layer ◽  
Grain Filling ◽  
Photosynthetic Characteristics ◽  
Summer Maize ◽  
Supplemental Irrigation ◽  
Area Index ◽  
Use Efficiency

In the southern Huang-Huai-Hai (HHH) region, China, maize production is frequently threatened by waterlogging at the seedling stage and by drought at the big flare stage. A two-year field experiment was performed to explore whether subsoiling (SS) in the winter wheat season could improve the photosynthetic capacity and increase the water use efficiency (WUE) of summer maize using the variety, Luyu9105. A split design was adopted in the experiment. The main plots used tillage practices, including SS and rotary tillage (RT). The subplots consisted of two irrigation methods, i.e., applied supplemental irrigation at the big flare stage (I) and no irrigation at the big flare stage (NI). The results showed that the SS treatment significantly increased soil water content (SWC) in the 40–60 cm soil layer. The SS treatment improved green leaf area index (gLAI) by 15.1%–30.2%, and enhanced the ear-leaf net photosynthetic rate (Pn), stomatal conductance (gs), intercellular CO2 concentration (ci) and transpiration rate (Tr), and was accompanied by an increase in the grain-filling duration (T) by 5 days and the mean grain-filling rate (Va). The SS treatment decreased the stomatal limitation (Ls), indicating that RT treatment, which was under lower SWC, led to a decrease in Pn. Applied supplemental irrigation under RT treatment was able to compensate for the growth of leaves, but could not reverse the decreasing trend in the gLAI. Ultimately, the SS treatment improved WUE by 9.1%–9.9%, and increased grain yields by 10.0%–29.3%. Therefore, this study showed that in the southern Huang-Huai-Hai Plain, which has a yellow cinnamon soil type, the practice of SS can improve the photosynthetic characteristics of leaves and WUE of rainfed summer maize.

Water Sources and Water‐Use Efficiency in Mediterranean Coastal Dune Vegetation

Plant Biology ◽  
2004 ◽  
Vol 6 (3) ◽  
pp. 350-357 ◽  
Author(s):  
G. A. Alessio ◽  
M. Lillis ◽  
E. Brugnoli ◽  
M. Lauteri
Keyword(s):  
Water Use Efficiency ◽  
Water Use ◽  
Water Sources ◽  
Coastal Dune ◽  
Dune Vegetation ◽  
Use Efficiency ◽  
Coastal Dune Vegetation

scholarly journals Effect of Microsprinkler Irrigation under Plastic Film on Photosynthesis and Fruit Yield of Greenhouse Tomato

2020 ◽  
Vol 2020 ◽  
pp. 1-14
Author(s):  
Mingzhi Zhang ◽  
Zhenguang Lu ◽  
Qingjun Bai ◽  
Yushun Zhang ◽  
Xinqiang Qiu ◽  
...  
Keyword(s):  
Water Use Efficiency ◽  
Water Use ◽  
Photosynthetic Rate ◽  
Dry Matter ◽  
Photosynthetic Characteristics ◽  
Fruit Yield ◽  
Dry Matter Accumulation ◽  
Plastic Film ◽  
Greenhouse Tomato ◽  
Use Efficiency

The aim of this study is to exam the effect of microsprinkler irrigation technology under plastic film (MSPF) and to evaluate the reasonable micropore group spacing and capillary arrangement density in the greenhouse. Compared with drip irrigation under plastic film (DIPF) and microsprinkling irrigation (MSI) conditions, the effects of different micropore group spacing (L1: 30 cm micropore group spacing, L2: 50 cm micropore group spacing) and capillary arrangement density (C1: one pipe for one row, C2: one pipe for two rows, and C3: one pipe for three rows) with the MSPF on photosynthetic characteristics and fruit yield of tomatoes were studied using completely randomized trial design. The results showed that under the same irrigation amount, compared with DIPF and MSI, the photosynthetic rate of tomatoes treated with L1C2 increased by 8.24% and 13.55%, respectively. The total dry matter accumulation, yield, and water use efficiency at condition of L1C2 increased by 12.16%, 19.39%, and 10.03% compared with DIPF and 26.38%, 20.46%, and 31.02% compared with MSI, respectively. The results provide evidence that the MSPF can be applied to greenhouse tomatoes. The photosynthetic rate, total dry matter accumulation, yield, and water use efficiency of tomato leaves cultivated at a micropore group spacing of 30 cm were 1.07, 1.13, 1.14, and 1.13 times higher than those of 50 cm, respectively. With the decrease in capillary arrangement density, the photosynthetic characteristics of the tomato leaves, the total dry matter accumulation, and yield of tomatoes all experienced a decline. It is recommended to use a combination of one pipe for two rows of capillaries at a 30 cm micropore group spacing as the technical parameter of greenhouse tomato with MSPF in arid and semiarid sandy loam soils.

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