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 ที่มา:Effects of some soil amendments on changes in some soil properties and pointed cabbage yield in highland agricultural systemหัวเรื่อง:ผลของวัสดุปรับปรุงดินบางชนิดต่อการเปลี่ยนแปลงสมบัติดินบางประการและผลผลิตกะหล่ำปลีหัวใจในระบบเกษตรที่สูง |
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 หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Development of Male and Female Parents of F1 Hybrid in Chinese Cabbage) ผู้เขียน: Ekapote Payakhapaab,, Tragool Tunsuwan,, Chokchai Chimonkon,, Dumdern Karadee, Maneechat Nikonpun สื่อสิ่งพิมพ์:pdf AbstractMale and female parents were improved to produce good hybrid progenies of Chinese cabbage, a highly self-incompatible vegetable crop. Hybrid seed production using bees was also studied. Inbred seeds of 4 Chinese cabbage lines were produced using bud pollination which is a conventional technique for inbred lines. Results showed that line 40-9 gave the highest seed weight of 0.165 g/plant. Using seed set analysis technique to check self-incompatibility, lines 23-3-4, 27, 27-3-7, and 40-9 were found to be self-incompatible among the 9 Chinese cabbage lines evaluated. However, when fluorescent microscope technique was used, the self-incompatible lines were 23-3-4, 27, 27-3-7, 40-9, and 142. Four inbred lines with self-incompatibility were selected to produce seeds. When line 40-9 was used as female parent in reciprocal crosses by bee pollination, the progenies gave the highest seed yield, an indication of maternal effect. Crosses 40-9 x 142-5, 40-9 x 27-3-7 and 40-9 x 23-3-4 gave high seed weight of 4.8, 3.9 and 2.7 kg/rai, respectively. Comparison of 11 Chinese cabbage hybrids with 3 commercial varieties showed that hybrid 142-5 x 40-9 gave the highest head yield with 6,170 kg/rai, 36.3% higher than commercial varieties. Other crosses such as hybrids 23 x 27, 23 x 142, 27-3-7 x 23-”.-4, 27-3-7 x 142-5 and 40-9 x 23-3-4 had good horticultural characteristics. These results indicate that improvement of parental lines is necessary to enhance good F1 hybrid. |
หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Risk Assessment and Degradation of an Insecticide (Chlorpyriphos): A Decontamination Study under Different Culinary Processes in/on Cabbage) ผู้เขียน:Md. Wasim Aktar, Dwaipayan Sengupta, Mariappan Paramasivam, Ashim Chowdhury สื่อสิ่งพิมพ์:pdf AbstractChlorpyriphos 20 EC was applied at the rate of 500 g ai. ha-1 to cabbage heads and the samples harvested at intervals of 0 (2 hours after application), 1 and 7 days after application. The calculated half-life value and safe waiting period (8.75 and 45.29 days, respectively) indicated its persistence. Thus, to reduce the safe waiting period, efforts were made to decontaminate the chlorpyriphos residue from the cabbage head by various household preparations (viz. washing, cooking, washing plus cooking, salt water dipping, dipping in boiled salt water, dipping in detergent solution and dipping in boiled detergent solution). Statistical analysis of the data using Duncan’s multiple range test revealed that various household processing treatments substantially reduced the residue of chlorpyriphos in cabbage heads by a range of 27.89-73.32% but none were able to satisfactorily reduce the residue to below the tolerance level of 0.05 mg kg-1. |
หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Effect of Succinic acid 2,2- dimethylhydrazide (SADH) on Head Formation of Off-Season Thianchin # 23 Chinese Cabbage) ผู้เขียน:Chamnonk Uthaiburt, พีรเดช ทองอำไพ*,  นางสาวอริยา คุโณทัย, อาจารย์ สื่อสิ่งพิมพ์:pdf AbstractThe effect of SADH was studied in relation to head formation of off-season growing ‘Thianchin # 23’ (Brassica compestris L. ssp pekinensis) (Lour) Olsson) Chinese Cabbage. Plants were treated with 1,000 2,000 and 4,000 ppm SADH four times at every 4 – day period after they were transplanted for 30 days. It was found that SADH treatment largely increased total fresh weight, head weight and heading percentage as compared to the control. Plants treated with 2,000 and 4,000 ppm, SADH at 2,000 and 4,000 ppm increased 3-fold in head weight higher than the control. The heading efficiency (head weight : outer leaves weight ratio) of the SADH treated plants was about 3-fold higher than the control. |
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