Canopy development in grain legumes grown under different soil water regimes in a semi-arid tropical environment

1985 ◽  
Vol 11 ◽  
pp. 99-109 ◽  
Author(s):  
R.C. Muchow
Keyword(s):  
Soil Water ◽  
Grain Legumes ◽  
Tropical Environment ◽  
Canopy Development ◽  
Water Regimes ◽  
Semi Arid

scholarly journals Effect of Irrigation Water Regimes on Yield of Tetragonia Tetragonioides

Agriculture ◽  
2019 ◽  
Vol 9 (1) ◽  
pp. 22 ◽  
Author(s):  
Gulom Bekmirzaev ◽  
Jose Beltrao ◽  
Baghdad Ouddane
Keyword(s):  
Soil Water ◽  
Irrigation Water ◽  
Arid Regions ◽  
Total Yield ◽  
Soil Salinization ◽  
Soluble Carbohydrates ◽  
Water Regimes ◽  
Irrigation Regimes ◽  
Semi Arid ◽  
Tetragonia Tetragonioides

The main purpose of this experiment was to study the effect of several irrigation water regimes on Tetragonia tetragonioides (Pall) O. Kuntze in semi-arid regions. During the experiment period, it was measured that several irrigation regimes were affected in terms of growth, biomass production, total yield, mineral composition, and photosynthetic pigments. The experiment was conducted in the greenhouse at the University of Algarve (Portugal). The study lasted from February to April in 2010. Three irrigation treatments were based on replenishing the 0.25-m-deep pots to field capacity when the soil water level was dropped to 70% (T1, wet treatment), 50% (T2, medium treatment), and 30% (T3, dry treatment) of the available water capacity. The obtained results showed that the leaf mineral compositions of chloride and sodium, the main responsible ions for soil salinization and alkalization in arid and semi-arid regions, enhanced with the decrease in soil water content. However, the minimum amounts of chlorophyll, carotenoids, and soluble carbohydrates in the leaf content were obtained in the medium and driest treatments. On the other hand, growth differences among the several irrigation regimes were very low, and the crop yield increased in the dry treatment compared to the medium treatment; thus, the high capacity of salt-removing species suggested an advantage of its cultivation under dry conditions.

scholarly journals Impact of soil water regimes and partial root-zone drying in field-grown papaya in semi-arid conditions

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Dionei Lima Santos ◽  
Eugênio Ferreira Coelho ◽  
Rubens Alves de Oliveira ◽  
Roberto Filgueiras ◽  
Márcio da Silva Alves ◽  
...  
Keyword(s):  
Soil Water ◽  
Vegetation Index ◽  
Normalized Difference Vegetation Index ◽  
Root Zone ◽  
Water Productivity ◽  
Soluble Solids ◽  
Horizontal Distance ◽  
Water Regimes ◽  
Arid Conditions ◽  
Semi Arid

AbstractThis study aimed to evaluate in the papaya Tainung genotype, the effects of partial root-zone drying (PRD) technique on soil water regimes by using different frequencies of shifting irrigation-side of plant row and the effects of PRD technique on (1) crop agronomic performance, (2) titratable fruit acidity (TA), (3) total soluble solids (TSS), and TSS/TA ratio. Also, we analyze the spatial dynamic of papaya condition using normalized difference vegetation index (NDVI) from different satellite images. The study was conducted in the semi-arid region of Bahia (BA) and Minas Gerais (MG), Brazil. The combination of 100% (Full irrigation—FU), 50%, and 35% in the irrigation depth (WID) and frequencies of shifting plant-row side irrigation of 0 (Fixed Irrigation—FX), 7, 14, and 21 days were applied. Nine treatments were studied in BA and five in MG. The water available in the soil was reduced to 44% for frequencies of shifting plant-row side irrigation of 7 days, 50% for 14 days, and 85% for 21 days, compared to the soil water availability at field capacity. Partial water deficit in the soil through the PRD technique did not significantly reduce the total root length, effective root depth, and root effective horizontal distance of the papaya Tainung genotype. However, PRD treatments showed leaf abscission, which resulted in reduced leaf area and NDVI values, especially in the MG experiment. Papaya yield and fruit quality were not affected. However, except for PRD 21 35%, irrigation water depth reduced to 50 and 35% under PRD increased crop water productivity (CWP) in papaya plants. Thus, the PRD technique may save 35% of WID using the alternation of lateral shift irrigation of crop row every 7 days under water scarcity in semi-arid regions. The NDVI index was important to compare the papaya canopy vigor between the experimental areas studied. We also confirmed the potential of NDVI to monitor the vigor of papaya canopy, since we could notice the sensibility of NDVI to identify water stress in papaya in higher vapor pressure deficit (VPD) conditions occurred in October 2016 and January 2017 in Bom Jesus da Lapa-BA. Therefore, the PRD strategy can be a useful tool to save water in papaya cultivation under semi-arid conditions.

The influence of tillage on semi-arid soil–water regimes in Zimbabwe

Geoderma ◽  
2000 ◽  
Vol 95 (1-2) ◽  
pp. 33-51 ◽  
Author(s):  
S.J. Twomlow ◽  
P.M.C. Bruneau
Keyword(s):  
Soil Water ◽  
Arid Soil ◽  
Water Regimes ◽  
Semi Arid

Soil water regimes of annual and perennial forages during drought years in the Aspen Parkland ecoregion of Alberta

2007 ◽  
Vol 87 (5) ◽  
pp. 523-533 ◽  
Author(s):  
D L Bradshaw ◽  
D S Chanasyk ◽  
V S Baron ◽  
M A Naeth
Keyword(s):  
Soil Water ◽  
Sandy Loam ◽  
Kentucky Bluegrass ◽  
Early Summer ◽  
Pasture Production ◽  
Canopy Development ◽  
Water Regimes ◽  
Aspen Parkland ◽  
Meadow Bromegrass ◽  
Wilting Point

Periodic and prolonged drought can be devastating to pasture production, which increases the financial risk for grazing enterprises. A study was conducted during 2 drought years (2002 and 2003) in the aspen parkland at Lacombe, Alberta, Canada, to compare the soil water regime of meadow bromegrass (Bromus riparius Rhem.), alfalfa (Medicago sativa L.), and annual [oat (Avena sativa L.) and winter triticale (X Triticosecale Wittmack)] pastures with a naturalized, old grass pasture consisting of quackgrass (Elytrigia repens L.), smooth bromegrass (Bromus inermis Leyss.), and Kentucky bluegrass (Poa partensis L.). The pasture soil was an Orthic Black Chernozem of fine sandy loam to loam texture. Soil water measurements were conducted between May and October over 2 yr using a neutron scattering hydroprobe to a depth of 1.6 m. Annual and meadow bromegrass had similar and highest cumulative and volumetric water contents and old grass had the lowest. All pastures tended to use all water available by the end of the season, but annual pasture had higher soil water in spring and early summer due to delayed canopy development. Soil in the upper 40 cm of annual and meadow bromegrass pastures was at wilting point 5 to 10% of all measurement times compared with 65 to 71% of measurement times for alfalfa and old grass. Annual and meadow bromegrass pastures did not extract water below 1.2 m, while the other pastures did, and on the basis of soil water regimes, appear to be lower risk options than status quo old grass and alfalfa pastures during drought. Key words: Soil water, forages, rotational grazing, drought, wilting point, field capacity

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