The optimum fertility conditions for maximizing yield and quality of tomatoes in the open field

1978 ◽  
Vol 8 (3) ◽  
pp. 199-212 ◽  
Author(s):  
J. Vandamme ◽  
I. Scheys ◽  
D. Lamberts
Keyword(s):  
Agronomy ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 197
Author(s):  
Olga Kosakowska ◽  
Zenon Węglarz ◽  
Katarzyna Bączek

Common thyme (Thymus vulgaris L., Lamiaceae) is regarded as one of the most important aromatic plant used both as a spice and medicine. The aim of this work was to investigate the yield and quality of common thyme grown for a fresh herb, cultivated in the organic farming system, within the temperate climate in Poland. Two methods of cultivation were applied: open field and foil tunnel. Three successive cuts of herb were possible to obtain during vegetation season, from the middle of July until the end of September. The raw material was analyzed for the content of essential oil (by hydrodestillation), phenolic acids and flavonoids according to Polish pharmacopeia (PP 6th). The composition of essential oil was determined by gas chromatography-mass spectrometry (GC-MS). Sensory evaluation was carried out by quantitative descriptive analysis (QDA) with a trained panelist. The yield of fresh herb was visibly higher when regards cultivation under foil tunnel in comparison to open field, reaching up to 6.74 kg FW × 10 m2. The content of essential oil as well as the percentage share of thymol (a dominant constituent, achieving up to 57.08%) decreased with consecutive herbal cuts. The opposite result was observed for phenolic compounds (phenolic acids and flavonoids). It was shown that the amount of flavonoids was similar in both variants of cultivation, while phenolic acids were accumulated at higher level in the open field conditions. Sensory analysis indicated on slight differences in odor and taste attributes, between samples of fresh herb collected from open field and foil tunnel.


2021 ◽  
pp. 1-19
Author(s):  
Gregorio Gullo ◽  
Antonio Dattola ◽  
Vincenzo Vonella ◽  
Rocco Zappia

BACKGROUND: In the Mediterranean basin, the solar radiation received is very high for many tree species over several hours of the day during the summer. Using a photoselective net can improve the climatic conditions and also modify the quality of light received. OBJECTIVE: This study aimed to evaluate the influence of the colour of photoselective nets on the yield and quality of Actinidia chinensis. MATERIALS: The experiment was carried out in Southern Italy on an orchard of Jintao kiwifruit. Photoselective nets of different colours were used: black, red, yellow, white, and grey. The resulting fruits were compared to those of plants in the open field. A randomised block design was adopted. Environmental, vegetative, and leaf gas exchange parameters; yield; and fruit quality were defined. All data were analysed using the Variance Analysis (ANOVA) and the Principal Component Analysis (PCA). RESULTS: Photoselectivity influenced production. The best results were obtained under the red net in terms of production and fertility indices. Fruit size, maturation indices, and nutraceutical parameters were also higher under the red net. Among the nets, the grey net induced the worst tree productivity results and the worst fruit quality parameters. However, all nets showed better results compared to the open field. CONCLUSION: The photoselective net strongly influenced the yield and quality of Jintao kiwifruit and the better results compared to the open field. The red net proved to be the best performer for the environment where the experiment was carried out.


2017 ◽  
Vol 16 (2) ◽  
pp. 137-148
Author(s):  
Reiko Hojo ◽  
Kazuki Tsuge ◽  
Yoko Higuchi ◽  
Hitoshi Yamahatsu ◽  
Shoichi Kato ◽  
...  

Data in Brief ◽  
2020 ◽  
Vol 32 ◽  
pp. 106183
Author(s):  
Long Thien Tran ◽  
Anh Tuan Nguyen ◽  
Tuan Thanh Nguyen ◽  
Ngoc Thi Pham ◽  
Long Tien Nguyen ◽  
...  

Author(s):  
K.D. Rathod ◽  
T.R. Ahlawat ◽  
Sanjeev Kumar ◽  
M. Sarkar ◽  
B. Chakraborty

Background: The South Gujarat hilly part is considered to be a non-traditional area of strawberry cultivation in India. The poor farmers of this region are cultivating strawberries under open field condition. Both, the yield and quality of strawberry fruits of this region are not up-to-the-mark as there in other parts of the country. Hence, a low-cost improved production technology is required to maximize yield as well as improve the quality of strawberry fruits. Method: Uniform runners of strawberry cv. Winter Dawn were grown in open field under paddy straw as bedding material. Foliar spraying of plant growth regulators viz. NAA (50, 75, 100 and 125 mg l-1) and GA3 (50, 75, 100 and 125 mg l-1) were done at 30 and 60 days after planting. The experiment was laid out in randomized block design with control plants receiving no spray treatments and replicated thrice. Result: The plant growth parameters like plant spread, number of leaves, number of crowns, leaf area, length of petiole, number of runners were recorded maximum with the application of 100 mg l-1 GA3. This treatment was also found to be the best in respect of number of flowers, number of fruits, fruit weight, marketable and total fruit yield of strawberry. Strawberry fruits with the highest total soluble solid, ascorbic acid, reducing sugar, non-reducing sugar and total sugar content were recorded in the plants which received 125 mg l-1 NAA. However, the plant growth regulator treatments failed to influence any significant effect on days taken to 50.0% flowering, fruit firmness and acidity content of strawberry fruits. 


Agronomie ◽  
2003 ◽  
Vol 23 (3) ◽  
pp. 193-201 ◽  
Author(s):  
Giorgio Borreani ◽  
Pier Giorgio Peiretti ◽  
Ernesto Tabacco

Sign in / Sign up

Export Citation Format

Share Document