Search Result of "Sawai Pongkao"

About 4 results
Img

ที่มา:วิทยาสารเกษตรศาสตร์ สาขา วิทยาศาสตร์

หัวเรื่อง:การศึกษาเบื้องต้นของการปรับตัวถั่วเขียวผิวมันในสภาพแวดล้อมของกำแพงแสน

ผู้เขียน:ImgSawai Pongkao, Imgดร.อภิพรรณ พุกภักดี, ศาสตราจารย์, ImgHarissadee Patharadilok

สื่อสิ่งพิมพ์:pdf

Abstract

An experiment was conducted to study the climatic adaptation of mungbean (Vigna radiate (L.) Wilczek) at the Kamphaeng Saen Campus of Kasetsart University. The main objectives were to find out how the mungbean varieties tested adapted to the Kamphaeng Saen environment and how environmental interaction affected growth and development of these varieties. This investigation hopes to provide some information for crop improvement and methods of cultural practice. The study employed 14 mungbean genotypes which were seeded on the eleventh of each month for 12 consecutive months starting from June 1986 onward. Besides stages of development and growth, detailed climatic variables e.g. daylengths, temperatures and rainfall distribution were also recorded. The results revealed that climatic variables e.g. daylengths, temperatures and soil moisture, exerted strong influence on growth and development and yield of mungbean, however, the degree of response was dependent on varieties that were used. Days to flowering were hastened by short daylengths. However, low air temperatures in November and December delayed flowering and maturity. High soil moisture during the rainy season retarded mungbean growth. The best sowing dates for optimum growth and yield for the Kamphaeng Saen environment were found to be between March and June.

Article Info
Agriculture and Natural Resources -- formerly Kasetsart Journal (Natural Science), Volume 023, Issue 4, Oct 89 - Dec 89, Page 331 - 339 |  PDF |  Page 

Img

ที่มา:วิทยาสารเกษตรศาสตร์ สาขา วิทยาศาสตร์

หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Growth Stage Identification in Mungbean (Vigna radiata (L.) Wilczek))

ผู้เขียน:Imgดร.อภิพรรณ พุกภักดี, ศาสตราจารย์, ImgVilaiwan Promkham, ImgChutanart Chuangpetchinda, ImgSawai Pongkao, ImgChalermpol Lairungrueng

สื่อสิ่งพิมพ์:pdf

Abstract

Growth stage descriptions were developed for Mungbean (Vigna radiata (L.) Wilczek) based on measurements and visual observations of Mungbean plants grown in four successive experiments conducted from May 1986 to November 1978 at Chainat Field Crop Research Center, Department of Agriculture and Department of Agronomy, Kasetsart University. It is proposed that the growth stages of Mungbean be defined in terms of vegetative (V) and reproductive (R) stages. The V stages are numbered V(o) – V(n), and are determined by counting the number of developed nodes on the main stem, beginning with the cotyledonary node as zero. The last node counted must have its trifoliate leaf sufficiently expanded so that leaflets are unfolded and flat in appearance. The R-stages proposed are R1 (first open flower), R2 (first pod), R3 (start of seed growth), R4 (full seed), R5(first mature pod), R6(1st harvest) and R7 (2nd harvest). The V and R stages can be measured separately and concurrently and apply to a population, or to single plants. When Mungbean cultivars, Kamphaeng Saen 1 (KPS-1), Kamphaeng Saen 2 (KPS-2), Uthong 1 and Chainat 60 were grown in a randomized complete block design at Chainat Field Crop Research Center (Chainat FCRC) in May and August 1986. Also at Kasetsart University (KU) cultivars KPS-1, KPS-2, and U-thong 1 were grown in May and August 1987. It was found that, cultivars, KPS-1, KPS-2 and U-thong 1 grown at KU matured in 86 and 78 days at May and August planting. At Chainat, cultivars KPS-1, KPS-2 and U-thong 1 matured in 58 days regardless of planting dates, while Chainat 60 matured in 51 and 52 days for May and August planting respectively. At all locations tested, all mungbean cultivars at least completed their vegetative growth up to V6 before shifting to R1. In many cases, the plants extended their vegetative growth up to V, before flowering depending on genotypes, planting dates and locations. To complete its life cycle, the mungbean plants consequently exhibited R1 up to R2 growth stages. The propose growth stage description of mungbean should be potentially useful and facilitate a common understanding among researchers and extension personnels and should provide a more precise basis for scheduling cultural practices for mungbean.

Article Info
Agriculture and Natural Resources -- formerly Kasetsart Journal (Natural Science), Volume 026, Issue 1, Jan 92 - Mar 92, Page 75 - 80 |  PDF |  Page 

Img

ที่มา:วิทยาสารเกษตรศาสตร์ สาขา วิทยาศาสตร์

หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Effect of Juvenile Leaf Removal on Symbiotic N Fixation and Yield of Mungbean (Vigna radiata (L.) Wilczek))

ผู้เขียน:ImgSawai Pongkao, ImgAmnuay Yothasir

สื่อสิ่งพิมพ์:pdf

Abstract

A randomized complete block design with 3 replications was conducted on Bangkhen soil series at Kasetsart University, Bangkhen campus in the early rainy season of 1994. The treatments composed of 0, 33, 66 and 100% juvenile leaf removal of mungbean at the V 4 stage. The results indicated that the higher the degree of leaf removal, the lesser the nodule number, nodule dry weight, symbiotic N fixation, total dry weight and seed yield were expected. Number of pods per plant was the only yield component that had a main effect on yield. The loss on 33% juvenile leaves was not as severe as those of the 66 and 100% in terms of seed yield when compared to the control.

Article Info
Agriculture and Natural Resources -- formerly Kasetsart Journal (Natural Science), Volume 029, Issue 2, Apr 95 - Jun 95, Page 246 - 251 |  PDF |  Page 

Img

ที่มา:วิทยาสารเกษตรศาสตร์ สาขา วิทยาศาสตร์

หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Effect of Sowing Dates and Amount of Nitrogen Fertilizer at Sowing on Fixation Activity and Different Attributes of Lupinus albus L. cv. Kievskij Mutant)

ผู้เขียน:ImgSawai Pongkao

สื่อสิ่งพิมพ์:pdf

Abstract

Lupinus albus. Cv. Kievskij Mutant was sown on two sowing dates, 17 march 1978 and 6 April 1978 respectively. The early-sown crop was shorter, less branched, senesced several weeks earlier and gave seed yield only half of the late-sown. The early-sown crop produced 33 percent of its seed yield on the branches compared with 47 percent in the late sown. Delaying in sowing more than doubled the seed yield of the branches whilst the main shoot seed yield increased by 50 percent. These differences are probably due in large part to the ‘excessive vernalization’ which The early-sown crop experienced and which was greatly reduced by a three-week delay in sowing. The late-sown crop showed no significant response to nitrogen fertilizer although the 20 and 80 kg treatment yields almost certainly gave some advantage. The earlier senescence which the early-sown exhibited may have been a major factor in reduced nodule growth after the end of June and for the fact that fixation activity reached only a quarter of the level attained by the late-sown crop. Senesced leaves contributed a small portion to total dry matter, they were 7.34 and 4.66 percent for the early and late-sown crop respectively.

Article Info
Agriculture and Natural Resources -- formerly Kasetsart Journal (Natural Science), Volume 021, Issue 4, Oct 87 - Dec 87, Page 378 - 389 |  PDF |  Page