The cultivation of netted melon is becoming popular in vegetable farms in Vietnam. The netted melon cultivar ‘Inthanon RZ’ was evaluated for its growth ability, yield, fruit quality, and economic efficiency when treated with densities of 38,000 and 33,000 plants/ha and four foliar fertilizer sprays: Biotic foliar AMINO ACID 1000, NPK NUTRI-GOLD 29-10-10 + 3 MgO + TE, NPK HAI-CHYODA 14-17-12 + 12 S, and NPK DAU TRAU 30-10-5 + TE. The experiment was conducted in a plastic house at the Biotechnology Institute of Hue University from January to April 2019. The experiment area was 72 m2. The results indicate that plants have a similar growth time under the cultivation conditions. The plants grown with the density of 38,000 plants/ha exhibit a higher leaf area index. The actual yield ranges from 34.00 tons/ha (AMINO ACID 1000; 33,000 plants/ha) to 46.22 tons/ha (NPK HAI-CHYODA 14-17-12 + 12 S; 38,000 plants/ha). Applying NPK HAI-CHYODA 14-17-12 + 12S or NPK DAU TRAU results in the Brix grade higher than 12.0 for both plant densities. Powdery mildew is the most frequently observed in the treatments with NPK DAU TRAU. The yield and profit obtained from trading the melon are highest for the density of 38,000 plants/ha with fertilizer NPK HAI-CHYODA 14-17-12 + 12S.
Sponge gourd varieties having aroma after cooking have been degenerated because of cross pollination. Collection and evaluation of sponge gourd germplasm are needed for conservation and breeding of high quality varieties. The objective of the study was to identify varieties having high yield, good quality and aroma under local conditions. Ten promising sponge gourd accessions, including A2, A6, A7, A13, A16, A17, B29, B30, HN and QN were evaluated for growth, morphological traits, fruit quality and yield. The experiment was carried out in Hue University of Agricultural and Forestry from June to October in 2014. The results showed that all promising accessions grew well. Different morphological traits were observed among promising lines. Yield of accessions A7, A13 and A17 were higher than the others. Only fruits of accession B29 had aroma after cooking. These lines can be used in sponge gourd breeding programs.
Abstract: Enhancing the production yield fornew generations of each horticultural crop needseffective selecting programs to find outexcellent traits forming thisfruit yield. Therefore,this study aims to investigate the correlations between the fruit yield withhorticultural traits, mainly with yield’s components and inheritance of some morphological traitsofsponge gourd (Luffa cylindrica). An F2 population was generated from a cross between sponge gourds GBVN006904 (male) and GBVN005333 (female) at University of Agriculture and Forestry, Hue University,Vietnam. The positive correlations are observed between the fruit yield per plant andthe fruit diameter, fruit weight, and number of fruits per plant (0.901**). The male first flower appearance time showsa significant positive correlation with female first flower appearance one. The peduncle length correlates positively with the fruit length. The fruit length is enhanced when fruit weight increases. The total soluble solids and fruit diameter show a slightly negative correlation. Chi-square analysis for the leaf shape, depth of lobing, leaf color, and leaf pubescence shows a good fit to a ratio of 9:6:1, thus being controlled by duplicate genes interaction. The fruit color (dark-green:light-green) fits well to a ratio of 15:1, giving its control to duplicate genes with dark-green color being dominant, whereas the fruit shape assorts independently according toa ratio of 9:3:3:1. The fruit stripe color exhibits monogenic incomplete dominance, and the curvature of the fruit is a monogenic recessive trait. Fruit yield components, such as the number of fruit per plant, the fruit weight, and the fruit diameter,strongly affect the fruit yield of sponge gourd. The inheritance of morphological traits indicates that most of the traits are controlled by complete dominance at both gene pairs excepted for fruit strip color and curvature of fruit.Keywords: correlation, inheritance, morphological traits, sponge gourd, yield components
The experiment was conducted in winter – spring 2016 – 2017 in Thua Thien Hue to identify suitable level of foliar fertilizer for Torenia fournieri Linden having good growth and development, beautiful color and long lifetime under local conditions. The experiment consisted of four treatments with three forliar fertilizers such: Dau Trau MK 30-10-5, Gibberellin 25-10-10, and HVP. The control treatment (I) was using sterilized water without foliar fertilizer. The results showed that all the foliar fertilizers well influenced on growth and development of Torenia fournieri Linden. Dau Trau MK 30-10-5 helped Torenia fournieri Linden having high quality and high value/cost ratio than the others.
Nghiên cứu này được thực hiện nhằm đánh giá một số đặc điểm về nông sinh học, năng suất, giá trị thương phẩm của hạt gạo và khả năng chống chịu sâu bệnh của một số giống mới được tuyển chọn. Các giống được thử nghiệm là 3 giống mới được chọn tạo tại Viện Công nghệ sinh học, Đại học Huế là TD1, TD2, TD3, giống địa phương gạo đỏ ARI và giống đối chứng là giống Khang dân. Các thí nghiệm được bố trí theo khối hoàn toàn ngẫu nhiên (RCBD), mỗi giống được trồng với 3 lần nhắc lại, dưới điều kiện thời tiết của vụ Đông – Xuân 2019, tại viện Công nghệ sinh học, Đại học Huế. Kết quả nghiên cứu cho thấy các giống khảo nghiệm có khả năng sinh trưởng và phát triển ổn định, cho năng suất khá và khả năng năng chống chịu sâu bệnh tốt. Giống TD3 đạt năng suất lúa (65,63 tạ/ha) tương đương so với giống đối chứng. Tỷ lệ gạo nguyên của các giống tuyển chọn cao hơn hẳn so với tỷ lệ gạo nguyên của giống đối chứng. Một số giống như TD1, TD3 và ARI có thể cho chất lượng cơm nấu tốt hơn giống đối chứng.
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