Growth, Quality and Irrigation Requirements of Melon Cultivars in Hydroponic Cultivation Using Coir Substrate

Cultivated lettuce (Lactuca sativa L.) is one of the most important leafy vegetables in the world, and most of the production is concentrated in the Mediterranean Basin. Hydroponics has been successfully utilized for lettuce cultivation, which could contribute to the diversification of production methods and the reduction of water consumption and excessive fertilization. We devised a low-cost procedure for closed hydroponic cultivation and easy phenotyping of root and shoot attributes of lettuce. We studied 12 lettuce genotypes of the crisphead and oak-leaf subtypes, which differed on their tipburn resistance, for three growing seasons (Fall, Winter, and Spring). We found interesting genotype × environment (G × E) interactions for some of the studied traits during early growth. By analyzing tipburn incidence and leaf nutrient content, we were able to identify a number of nutrient traits that were highly correlated with cultivar- and genotype-dependent tipburn. Our experimental setup will allow evaluating different lettuce genotypes in defined nutrient solutions to select for tipburn-tolerant and highly productive genotypes that are suitable for hydroponics.

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New evidence of arsenic translocation and accumulation in Pteris vittata from real-time imaging using positron-emitting 74As tracer

Scientific Reports ◽

10.1038/s41598-021-91374-1 ◽

2021 ◽

Vol 11 (1) ◽

Author(s):

Yi Huang-Takeshi Kohda ◽

Zhaojie Qian ◽

Mei-Fang Chien ◽

Keisuke Miyauchi ◽

Ginro Endo ◽

...

Keyword(s):

Imaging System ◽

Pteris Vittata ◽

Long Distance ◽

Long Distance Transport ◽

Hydroponic Cultivation ◽

Tracer Imaging ◽

Serial Images ◽

First Time ◽

New Evidence ◽

Hyperaccumulator Plant

AbstractPteris vittata is an arsenic (As) hyperaccumulator plant that accumulates a large amount of As into fronds and rhizomes (around 16,000 mg/kg in both after 16 weeks hydroponic cultivation with 30 mg/L arsenate). However, the sequence of long-distance transport of As in this hyperaccumulator plant is unclear. In this study, we used a positron-emitting tracer imaging system (PETIS) for the first time to obtain noninvasive serial images of As behavior in living plants with positron-emitting 74As-labeled tracer. We found that As kept accumulating in rhizomes as in fronds of P. vittata, whereas As was retained in roots of a non-accumulator plant Arabidopsis thaliana. Autoradiograph results of As distribution in P. vittata showed that with low As exposure, As was predominantly accumulated in young fronds and the midrib and rachis of mature fronds. Under high As exposure, As accumulation shifted from young fronds to mature fronds, especially in the margin of pinna, which resulted in necrotic symptoms, turning the marginal color to gray and then brown. Our results indicated that the function of rhizomes in P. vittata was As accumulation and the regulation of As translocation to the mature fronds to protect the young fronds under high As exposure.

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Effect of vermicompost on growth, quality and economic return of garlic (Allium sativum L.) at Haramaya District, Eastern Ethiopia

African Journal of Agricultural Research ◽

10.5897/ajar2017.12760 ◽

2019 ◽

Vol 14 (35) ◽

pp. 2159-2167

Author(s):

Tamiru Kenea Fikru ◽

Gedamu Fikreyohannes

Keyword(s):

Allium Sativum ◽

Eastern Ethiopia ◽

Economic Return ◽

Growth Quality ◽

Haramaya District

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Application of Biochar Functionalized with Layered Double Hydroxides: Improved Plant Growth Performance after Use as Phosphate Adsorbent

Applied Sciences ◽

10.3390/app11146489 ◽

2021 ◽

Vol 11 (14) ◽

pp. 6489

Author(s):

Jittrera Buates ◽

Tsuyoshi Imai

Keyword(s):

Layered Double Hydroxides ◽

Seedling Emergence ◽

Nutrient Release ◽

Application Rate ◽

Phosphate Removal ◽

Optimal Dosage ◽

Seedling Traits ◽

Phosphate Treatment ◽

Growth Quality ◽

Double Hydroxides

The objective of this study was to verify the feasibility of using biochar, functionalized with layered double hydroxides, as a fertilizer after its use in phosphate treatment (P-BC-LDHs). It was conducted with several levels of P-BC-LDHs using seed germination and early growth assays of lettuce (Lactuca sativa L.). The application of P-BC-LDHs resulted in successful seedling emergence, with an excellent germination capacity of over 96% for all treatments. However, compared to the controls, P-BC-LDHs did not provide favorable seedling traits. In contrast, in the latter experiments, lettuce cultivated under mixtures with P-BC-LDHs, particularly at an application rate of 2.5% (w/w), displayed superior growth quality to those under non-treated conditions. The length of lettuce shoots and roots from this optimal dosage were increased by at least 24% compared to untreated samples. A 17% reduction in biomass yield was observed for the samples from non-supplemented substrates. The nutrient release profiles showed that P-BC-LDHs were capable of slowly supplying phosphorus, thereby increasing the long-term nutrient availability for plants. The findings reported here provide important insights into these materials and confirm that P-BC-LDHs can be used for agricultural purposes after phosphate remediation applications. The results of this study provide constructive information to facilitate the implementation of biochar-based LDH composites for sustainable phosphate removal and recovery.

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Posttraumatic growth, quality of life, and treatment symptoms among cancer chemotherapy outpatients.

Health Psychology ◽

10.1037/a0028223 ◽

2013 ◽

Vol 32 (4) ◽

pp. 397-408 ◽

Cited By ~ 19

Author(s):

T. Em Arpawong ◽

Steven H. Richeimer ◽

Faye Weinstein ◽

Amany Elghamrawy ◽

Joel E. Milam

Keyword(s):

Quality Of Life ◽

Posttraumatic Growth ◽

Cancer Chemotherapy ◽

Growth Quality

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Climate change and Mediterranean agriculture: Impacts on winter wheat and tomato crop evapotranspiration, irrigation requirements and yield

Agricultural Water Management ◽

10.1016/j.agwat.2014.05.008 ◽

2015 ◽

Vol 147 ◽

pp. 103-115 ◽

Cited By ~ 103

Author(s):

Sameh Saadi ◽

Mladen Todorovic ◽

Lazar Tanasijevic ◽

Luis S. Pereira ◽

Claudia Pizzigalli ◽

...

Keyword(s):

Climate Change ◽

Winter Wheat ◽

Crop Evapotranspiration ◽

Tomato Crop ◽

Irrigation Requirements

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Effects of Node Position and Electric Conductivity of Nutrient Solution on Adventitious Rooting of Nasturtium (Tropaeolum majus L.) Cuttings

Agronomy ◽

10.3390/agronomy11020363 ◽

2021 ◽

Vol 11 (2) ◽

pp. 363

Author(s):

Wenshuo Xu ◽

Na Lu ◽

Masao Kikuchi ◽

Michiko Takagaki

Keyword(s):

Electric Conductivity ◽

Nutrient Solution ◽

Adventitious Rooting ◽

Cutting Propagation ◽

Apical Bud ◽

Hydroponic Cultivation ◽

Bud Position ◽

Seed Propagation ◽

Node Position

Nasturtium is a popular herbal plant, widely cultivated as culinary and medicinal plants all over the world. However, the seed propagation of nasturtium is inefficient, and in-vitro propagation is sophisticated and high-cost. In this study, the cutting propagation method was employed to produce nasturtium seedlings. We aimed to determine the optimal conditions for cutting propagation of nasturtium seedlings by investigating the effects of node position and electric conductivity (EC) of nutrient solution on the root formation of the cuttings. Cuttings from five node positions (apical bud, 2nd node, 3rd node, 4th node, and 5th node) were subjected to water and five EC (1.0, 2.0, 3.0, 4.0, and 5.0 dS m−1) treatments with a hydroponic cultivation system in a plant factory. Results showed that all cuttings rooted successfully within two weeks. The cuttings from the apical bud position rooted earliest and produced the most roots regardless of EC level. Cuttings from other node positions produced longer roots and heavier root fresh and dry weights than those from the apical bud position. The cuttings under EC of 1.0 dS m−1 had the greatest root number, the longest root length, and the heaviest root fresh and dry weights regardless of node positions. The EC of 1.0 dS m−1 is considered the best condition for nasturtium cuttings for the range of EC tested in this study, and the cuttings from all the five node positions can be used as seedling materials.

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