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A Study on Chlorophyll Fluorescence, Soil Acidity, Soil Moisture Contents and Plant Height in Relation to Different Polybag Size for Rubber Planting Materials During Transportation and after Field Transplanting
Wan Zuraidi Sulaiman - ไม่ระบุหน่วยงาน
ชื่อเรื่อง (EN): A Study on Chlorophyll Fluorescence, Soil Acidity, Soil Moisture Contents and Plant Height in Relation to Different Polybag Size for Rubber Planting Materials During Transportation and after Field Transplanting
ผู้แต่ง / หัวหน้าโครงการ (EN): Wan Zuraidi Sulaiman
บทคัดย่อ (EN): The study was carried out with the aim to assess and evaluate the effects of polybag size to the rubber planting materials with emphasis on chlorophyll fluorescence, soil moisture contents, soil acidity and plant height during transportation stage and after field transplanting. The survivality rate was also observed after the plants were transplanted in the field. Overall results showed no significant difference between all the parameters measured during transportation process at three and six hours for young budding of clone RRIM 928 and RRIM 2025. For the bare-root budded stump, clone RRIM 2025 showed a significant difference for chlorophyll fluorescence at three hours based on analysis of variance at pd”0.05. The chlorophyll fluorescence was found to be differed significantly between plants in polybag size 7"x15" – 6"x13" and 6"x13" – 5"x10" when the results were subjected to least significant different test for means comparison (pd”0.05). In term of survavility rate, generally, without concerning the clone, it was found that young budding in polybag size 5"x10" showed the highest mortality at 108 days (24%) compared to young budding and bare-root budded stump in polybag size 7"x15" (0%). At 190 days, young budding plants in polybag size 5"x10" showed another 10.5% mortality, followed by 5.9% mortality each for bare-root budded stump in polybag size polybag size 5"x10" and 6"x13" and 3.6% for young budding in polybag size 6"x13". Both plants in polybag size 7"x15" showed no mortality even after that time period. Further measurement of all the parameters were also carried out at 108 days and 190 days after field transplanting. It was clearly showed that young budding of RRIM 928 planted in polybag size 7"x15" exhibited the highest plant height and differed significantly at 190 days after transplanting based on analysis of variance at pd”0.05. Polybag size was found differed significantly between 7"x15" – 6"x13" and 7"x15" – 5"x10" when the results were subjected to least significant different test for means comparison. The results indicated that bigger polybag size played an important factor and could influence the plant height after transplanting. For the soil acidity, it was found that soil in polybag size 5"X10" were more acidic compared to other larger polybag size. Further analysis of variance using polybag size as source of variation showed a significant difference for the soil acidity (pd”0.001) at 190 days after transplanting. Mean comparison for soil acidity were found to be differed significantly between polybag size 7"x15", 6"x13" and 5"x10" subjected to least significant difference test at pd”0.001. The results indicate that polybag size contributed to different level of soil acidic which is resulted from different soil volume and presumably related to the concentration of the fertilizer when the soil moisture were losses in smaller polybag. Based on the result obtained, it can be concluded that the use of bigger polybag size such as 7"x15" and 6"x13" are very important to ensure that plants growth not affected during transportation and after field transplanting compared to smaller polybag size of 5"x10". Therefore, a minimum polybag size for production of two whorled hardened leaves of rubber planting materials should be 6"x13" which gives a comparable survivality rate, vigorous growth and better tolerance to uncertainty temperature. The findings also in line with the current revision of recommendation for rubber clonal planting materials specification in the Malaysian Standard.
บทคัดย่อ: ไม่พบข้อมูลจากหน่วยงานต้นทาง
ภาษา (EN): en
เผยแพร่โดย (EN): การยางแห่งประเทศไทย
คำสำคัญ (EN): field transplanting
เจ้าของลิขสิทธิ์ (EN): การยางแห่งประเทศไทย
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A Study on Chlorophyll Fluorescence, Soil Acidity, Soil Moisture Contents and Plant Height in Relation to Different Polybag Size for Rubber Planting Materials During Transportation and after Field Transplanting
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