How does the harvest index affect water‐use efficiency and nutrient‐utilization efficiency of sunflowers ( Helianthus annuus L.)?

2019 ◽  
Vol 205 (5) ◽  
pp. 519-532 ◽  
Author(s):  
Katrin Keipp ◽  
Birgit W. Hütsch ◽  
Sven Schubert
Keyword(s):  
Water Use Efficiency ◽  
Helianthus Annuus ◽  
Water Use ◽  
Harvest Index ◽  
Nutrient Utilization ◽  
Utilization Efficiency ◽  
Helianthus Annuus L ◽  
Nutrient Utilization Efficiency ◽  
Use Efficiency

scholarly journals Genetic Control of Water Use Efficiency and Leaf Carbon Isotope Discrimination in Sunflower (Helianthus annuus L.) Subjected to Two Drought Scenarios

PLoS ONE ◽  
2014 ◽  
Vol 9 (7) ◽  
pp. e101218 ◽  
Author(s):  
Afifuddin Latif Adiredjo ◽  
Olivier Navaud ◽  
Stephane Muños ◽  
Nicolas B. Langlade ◽  
Thierry Lamaze ◽  
...  
Keyword(s):  
Water Use Efficiency ◽  
Helianthus Annuus ◽  
Genetic Control ◽  
Carbon Isotope ◽  
Water Use ◽  
Carbon Isotope Discrimination ◽  
Isotope Discrimination ◽  
Helianthus Annuus L ◽  
Use Efficiency

Study on Efficiency of Rainfall and Flood Water Resources Utilization in Coastal Area

2013 ◽  
Vol 409-410 ◽  
pp. 79-82 ◽  
Author(s):  
Ying Qin Chen ◽  
Xian Feng Huang
Keyword(s):  
Water Resources ◽  
Water Use Efficiency ◽  
Water Use ◽  
Environmental Water ◽  
Utilization Efficiency ◽  
Agricultural Water ◽  
Domestic Water ◽  
Flood Water ◽  
Use Efficiency ◽  
Water Resources Utilization

Due to the rich resources of urban rainwater and transit flood in coastal areas, rational utilization of rainfall and flood water resources can improve the sustainable utilization, to better serve the coastal development. In this paper, the available quantity of water rainfall and flood water resources in coastal are distributed to domestic water, industrial water, agricultural water and ecologic environmental water. Water price method is used to calculate domestic water efficiency. Energy synthesis is used to calculate the industrial and agricultural water-use efficiency. Ecologic environmental water-use efficiency-sharing coefficient method is used to calculate the ecologic environmental water-use efficiency. Finally, taking Lianyungang City, a Jiangsu coastal city as an example to analyze the rainfall and flood water resources utilization efficiency. The results provide reference to the research for Chinas plain area rainfall and flood water resources efficiency analysis.

scholarly journals WATER USE EFFICIENCY, GROWTH AND YIELD OF WHEAT CULTIVATED UNDER COMPETITION WITH Setaria

2015 ◽  
Vol 33 (4) ◽  
pp. 679-687 ◽  
Author(s):  
M.Z. IHSAN ◽  
F.S. EL-NAKHLAWY ◽  
S.M. ISMAIL
Keyword(s):  
Drought Stress ◽  
Water Use Efficiency ◽  
Water Use ◽  
Harvest Index ◽  
Wheat Yield ◽  
Negative Association ◽  
Growth And Yield ◽  
Yield Losses ◽  
Wheat Production ◽  
Use Efficiency

ABSTRACT Understanding the critical period of weed competition is indispensable in the development of an effective weed management program in field crops. Current experiment was planned to evaluate the critical growth period ofSetaria and level of yield losses associated with delay in weeding in rain-fed drip irrigated wheat production system of Saudi Arabia. Field experiment was conducted to evaluate the effect of weeding interval (07-21, 14-28, 21-35, 28-42 and 35-49 days after sowing) and drought stress (75% and 50% of field capacity) on Setaria growth, wheat yield and water use efficiency. Season long weedy check and wellwatered (100% FC) plots were also maintained for comparison. Weeding interval and drought stress significantly (p ≤ 0.05) affected the growth and yield of Setaria and wheat. Drought stress from 75% to 50% FC resulted in reductions of 29-40% in Setaria height, 14-27% in Setaria density and 11-26% in Setaria dry biomass. All weeding intervals except 35-49 DAS significantly suppressedSetaria growth as compared with control. Delay in weeding increased weed-crop competition interval and reduced wheat yield and yield contributors. Therefore, the lowest yield of 1836 kg ha-1 was attained for weeding interval of 35-49 DAS at 50% FC. Water use efficiency and harvest index increased with decreasing FC levels but reduced with delay in weeding. Correlation analysis predicted negative association ofSetariadensity with wheat yield and yield contributors and the highest negative association was for harvest index (-0.913) and water use efficiency (-0.614). Early management of Setaria is imperative for successful wheat production otherwise yield losses are beyond economical limits.

Root pruning enhances wheat yield, harvest index and water-use efficiency in semiarid area

2019 ◽  
Vol 230 ◽  
pp. 62-71 ◽  
Author(s):  
Changlu Hu ◽  
Victor O. Sadras ◽  
Guoyan Lu ◽  
Runze Zhang ◽  
Xueyun Yang ◽  
...  
Keyword(s):  
Water Use Efficiency ◽  
Water Use ◽  
Harvest Index ◽  
Wheat Yield ◽  
Root Pruning ◽  
Semiarid Area ◽  
Use Efficiency

Water use efficiency of wheat in a Mediterranean-type environment. II. some limitations to efficiency

1984 ◽  
Vol 35 (6) ◽  
pp. 765 ◽  
Author(s):  
RJ French ◽  
JE Schultz
Keyword(s):  
Water Use Efficiency ◽  
Leaf Area ◽  
Water Use ◽  
Harvest Index ◽  
Field Experiments ◽  
Field Trials ◽  
Growth Yields ◽  
Potential Yield ◽  
Use Efficiency ◽  
Factorial Treatments

Evidence is presented that water use efficiency and yield of wheat are reduced by insufficient leaf area and by inadequate content of nutrients in the top growth. Yields from field trials are compared with the potential yield, and a review is made of the limitations caused by weeds, the incidence of diseases and the harvest index. The data highlight the need for field experiments to define the evaporation and transpiration components of water use in each environment. They also indicate the need for multi-factorial treatments to overcome all yield limitations and thereby attain the potential yield.

Water use and water use efficiency of old and modern wheat cultivars in a Mediterranean-type environment

1990 ◽  
Vol 41 (3) ◽  
pp. 431 ◽  
Author(s):  
KHM Siddique ◽  
D Tennant ◽  
MW Perry ◽  
RK Belford
Keyword(s):  
Water Use Efficiency ◽  
Water Use ◽  
Harvest Index ◽  
Dry Matter ◽  
Soil Evaporation ◽  
Wheat Cultivars ◽  
Total Water ◽  
Modern Cultivar ◽  
Modern Wheat ◽  
Use Efficiency

Water use and water use efficiency of old and modern wheat cultivars and one barley cultivar were measured in a Mediterranean environment at Merredin, W.A. Water use efficiency for grain increased substantially from old to modern cultivars, with little difference among modern cultivars. Water use efficiency for dry matter was similar between cultivars. Barley had the highest water use efficiency of both grain and dry matter. Improved water use efficiency for grain in modern cultivars was associated with faster development, earlier flowering, improved canopy structure and higher harvest index. Modern cultivars used slightly less water than old cultivars. The pattern of water use was also different, with late-maturing old cultivars using more water in the pre- than the post-anthesis period. The ratio of pre- to post-anthesis water use was highest with the late-maturing, old cultivar Purple Straw (5.2:1) and lowest with early-maturing, modern cultivar Gutha (3.0:1). Soil evaporation estimates showed that modern cultivars had lower rates of soil evaporation in the early part of the growing season. This was associated with their faster leaf area development and improved light interception. About 40% of the total water use was lost by soil evaporation with very little difference between wheat cultivars. Barley had 15% less soil evaporation than wheat. Water use efficiency for grain based on transpiration (transpiration efficiency) for the four modern cultivars was 15.8 kg ha-1 mm-1, similar to other studies in comparable environments. Some further improvement in water use efficiency appears possible through improvement in crop biomass and harvest index. However, given the frequent and severe limitations of total water supply at low rainfall sites such as Merredin, there appears to be more scope for improvement in yield and water use efficiency in the medium and high rainfall areas of the wheatbelt.

scholarly journals Effects of water stress on total biomass, tuber yield, harvest index and water use efficiency in Jerusalem artichoke

2016 ◽  
Vol 166 ◽  
pp. 130-138 ◽  
Author(s):  
Ruttanachira Ruttanaprasert ◽  
Sanun Jogloy ◽  
Nimitr Vorasoot ◽  
Thawan Kesmala ◽  
Rameshwar S. Kanwar ◽  
...  
Keyword(s):  
Water Stress ◽  
Water Use Efficiency ◽  
Water Use ◽  
Harvest Index ◽  
Tuber Yield ◽  
Jerusalem Artichoke ◽  
Total Biomass ◽  
Use Efficiency
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