 หัวเรื่อง:การทดสอบเบื้องต้นในไร่นาเกษตรกรถึงความเป็นไปได้ของการปลูกถั่วเหลืองในสภาพดินอิ่มตัวด้วยน้ำ โดยปลูกเดี่ยวและปลูกร่วมกับข้าว ผู้เขียน: Aphipan Pookpakdi, Prachya Rodjakhen, Phadungsith Inchaiya สื่อสิ่งพิมพ์:pdf AbstractA preliminary study on the possibility of planting soybean as sole crop or intercropping with rice under soil saturated condition was conducted in the farmer’s field at Krub yai Sub-district, Banpong district of Rachaburi Province. Split-split plot design with three replications was used in this study. Main plots consisted of soybean planted as sole crop and intercropping with rice in the soil saturated condition plus soybean planted as sole crop under normal irrigation scheme. Sub-plot consisted of three cultivars of soybean viz S.J.4, Nakornsawan 1 and A 138, and sub-sub plot consisted of with and with-out nitrogen fertilizer. Ammonium sulfate at the rate of 2.4 kg N/rai was applied at planting to soybean in nitrogen fertilizer treatment. The study was conducted between August-December 1989. The result of the study revealed that under soil saturated condition soybean planted as sole crop gave higher yield than those intercropped with rice. Under soil saturation, soybean gave significantly higher yield than those receiving normal irrigation scheme. Cultivar A 138 gave the highest yield among other cultivars tested and the effect of nitrogen fertilizer was not found. Rice intercropping with soybean gave significantly lower yield than rice planted as monoculture. Land equivalent ratio (LER) of soybean intercropping with rice was higher than monoculture cropping of rice and soybean. Gross income of soybean intercropping with rice was found to be highest among other treatments. However, based upon gross income derived only from soybean, it was found that soybean planted as sole crop under soil saturation gave the highest gross income. Cultivar A 138 gave the highest gross return than other cultivar used in this study. |
หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Yield GAP Analysis In Soybean Production) ผู้เขียน:Ambika CHARAN SHRIVASTAVA, Aphipan Pookpakdi,  นางอิสรา สุขสถาน, รองศาสตราจารย์ , ดร.เอ็จ สโรบล, ศาสตราจารย์ สื่อสิ่งพิมพ์:pdf AbstractIn the process of determining yield gap in soybean production, two types of experiments were conducted. The trials conducted at a research station in which Kamphaeng Saen was used as a site, simultaneousely an on farm trials were conducted in the farmer’s field at Banpong district of Ratchaburi Province. Prior to performing the experiment conducted, site selection and agro-ecological analysis of the target area were done and recorded. The results of the study indicated that potential possibilities of growing soybeans at Banpong was high. This is due to the fact that in research managed trials conducted at Kamplaeng saen and Banpong, the yield of soybean were 2.04 and 1.61 ton/ha were obtained, respectively, whereas the average farmers yield was 1.03 ton/ha. Yield gap between the trials conducted at Kamplaeng saen and Banpong indicated the effect of environmental conditions which differed between the experimental station and in the farmer’s field. Likewise, the fifferent in yield between the research trial and farmers field at Banpong indicated that socio-economic constraints prevailed in soybean production. Due to the competitiveness of cropping system at Banpong, farmers give priority to the main staple crop such as rice, sugar cane and vegetables which they are more familiar with. |
หัวเรื่อง:อิทธิพลของพันธุ์และปุ๋ยไนโตรเจนต่อการเจริญเติบโตและผลผลิตของถั่วเหลืองที่ปลูกในสภาพอิ่มตัวด้วยน้ำ ผู้เขียน:Aphipan Pookpakdi, Chareon Thuamkham, Vichitr Benjasil, นายชัยฤกษ์ สุวรรณรัตน์, ผู้ช่วยศาสตราจารย์ สื่อสิ่งพิมพ์:pdf AbstractTwo experiment were conducted in the early rainy seasons in order to study the effects of genotypes and rates of nitrogen fertilizer on growth and yield of soybean grown under saturated soil culture (SSC). A split-split plot design with three replications was used for each experiment. Main plots composed of growing soybeans alone on beds and growing soybeans on beds and transplanted rice in the furrows. Both treatments were kept under saturated soil culture condition. Sub-plots composed of two soybean cultivars, Chiang Mai 60 and Leichhardt while sub-sub-plots consisted of four rates of nitrogen fertilizer, 0, 31.2, 62.5 and 125.0 kg N/ha applied on beds. Results of the experiments revealed that yield of soybeans planted as monoculture under SSC was significantly higher than those intercropped with rice in both of the early rainy and dry seasons . In the early rainy season, cultivar Leichhardt out yielded cultivar Chaing Mai 60 while there were no significant differences in yield between two cultivars in the dry season. The difference in yield of soybeans as affected by nitrogen fertilizer was not detected in both experiments. The number of pods per plant and total dry matter per unit area of soybean responsed to the treatments given in the same manners as the yield of soybean. In this study, it has been found that soybean planted under saturated soil culture demonstrated high rate of nitrogen fixation both in the rainy and dry season. This might be the reason to explain why the response to nitrogen fertilizer were not detected in this study |
หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Response of New Soybean Accessions to Water Stress During Reproductive Phase) ผู้เขียน:Aphipan Pookpakdi, Kovit Thiravirojana, Intarat Saeradee, Sombon Chaikaew สื่อสิ่งพิมพ์:pdf Abstract Two cultivars and eight newly developed Kasetsart University soybean accessions were planted at the similar experiments conducted at Chiang Mai and Kamphang Saen in dry season, 1989. The objectives was to study the effect of reproductive water stress on growth and yield of soybeans. Split plot design with three replications was used in this study. The main plots composed of four water stress treatment i.e. control, early, mid, and late reproductive water deficit, while sub-plots composed of ten soybean varieties. It was found that water deficit lowered the yield and dry matter production of soybeans. Number of pods per plant and seed size were affected by reproductive stress while the number of seeds per pod was not affected. Accessions KUSL 20004, KUSL 20010 and Doi Kham produced the top three highest yields and seemed to be least affected by water deficit treatments. |
หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : The study on climatic Adaptation of Soybeans at Kamphaeng Saen, a Representative of Central Plain of Thailand) ผู้เขียน:Aphipan Pookpakdi, Harisadee Patharadilok สื่อสิ่งพิมพ์:pdf AbstractTwenty soybean genotypes of diverse origin and maturity were grown at Kamphaeng Saen Campus of Kasetsart University in the Central Plain region of Thailand. The purpose of this study was to obtain basic informations on the relative effect of sowing dates and cultivars on the performance of this crop. Soybeans were sown at monthly interval between June 1986 until May 1987. Measurements included phenology, total plant weight and yield. It was found that days to flower of soybeans were affected by daylength and temperature. Cultivars least affected by photoperiod were most affected by temperature particularly during the cooler months. Days to maturity was dependent upon days to flowering. Total plant weight and grain yield were strongly affected by phenology. Cultivars which flowered and matured properly would produced considerable amount of plant dry matter and grain yield. |