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งานวิจัยโครงการการจัดชั้นสมรรถนะความอุดมสมบูรณ์และศักย์ผลิตภาพของดินในบริเวณสถานีวิจัยเขาหินซ้อน (2014)หัวหน้าโครงการ: ดร.เสาวนุช ถาวรพฤกษ์, รองศาสตราจารย์ ผู้ร่วมโครงการ:ดร.เพชรดา ปินใจ, ผู้ช่วยศาสตราจารย์ , นายรฐนนท์ เจริญชาศรี , ดร.ทิมทอง ดรุณสนธยา, ผู้ช่วยศาสตราจารย์ , ดร.วิทยา จินดาหลวง, ผู้ช่วยศาสตราจารย์ , ดร.ดาวจรัส เกตุโรจน์, ผู้ช่วยศาสตราจารย์ , นายชัยภัทร คงแก้ว แหล่งทุน:เงินรายได้ส่วนกลาง มก. |
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 หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Effects of Intercropping Groundnut and Green-Manure Legumes to Corn on the Yields of Corn and Productivity and Chemical Properties of Soil) ผู้เขียน: A. Suwanarit, N. Lekhasoonthrakorn, J. Rungchuang, S. Kritapirom สื่อสิ่งพิมพ์:pdf AbstractAs an effort to find green-manure production methods that did not need complete devotion of land during the cropping season, a field experiment with three successive annual cropping was conducted in Thailand to examine effects of repetitive intercropping groundnut and green-manure legumes to corn for two successive years on the yields of the intercropped corn and soil productivity and chemical properties. Groundnut and green-manure legumes, which included creeping thornless mimosa, rice bean, sword bean, pigeon pea and lab lab, were intercropped to corn plants, which were grown with double-row spacing, and allowed to continue growing after harvesting and cutting down the stubble of the intercropped corn and were then chopped and plowed into the soil at about one month before the following annual cropping (9- 10 months after planting). Productivity of the soils were compared in the third cropping in which the plots for all of the treatments were planted to corn. Grain yields of corn intercropped with groundnut, lab lab, mimosa, pigeon pea, rice bean and sword bean in the first cropping were 102%, 92%, 86%, 79%, 76%, and 73% of that of the sole corn, respectively, whereas those obtained in the second cropping were 116%, 166%, 190%, 185%, 151%, and 123% of that of the sole corn, respectively. Grain yields of corn grown in plots previously cropped to corn-mimosa intercrops, corn-pigeon pea intercrops, corn-lab lab intercrops, corn-sword bean intercrops, corn-rice bean intercrops and corn-groundnut intercrops were 230%, 186%, 177%, 131%, 123%, and 112% of that of the plots previously treated with the sole corn. In general, the corn-mimosa intercropping system was the best and the corn-pigeon pea intercropping system and the corn-lab lab intercropping system were the second best in improving soil chemical properties. With the planting configuration used, intercropping corn with mimosa was most recommended and intercropping corn with pigeon pea or lab lab was the second most recommended for simultanous production of green-manure and corn. |
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หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Residual Effects of 20 Annual Applications of Ammonium Sulfate and Triple Superphosphate for Corn on Properties and Productivity of Oxic Paleustults) ผู้เขียน:A. Suwanarit, I. Suwanchatri, J. Rungchuang, V. Verasan สื่อสิ่งพิมพ์:pdf AbstractThe residual effects of 20 successive annual applications of N and P fertilizer for corn production on properties and productivity of an Oxic Paleustults were examined by field experiment. The experiment consisted of 4 application rates of N and P fertilizer, i.e., 0-0, 60-60, 120-120, and 180-180 kg N-P2O5/ha/ year in the forms of ammonium sulfate and triple superphosphate. The pH of the surface soil and sub-soil was decreased with increased rates of the fertilizers with more pronounced effects in the sub-soil. The EC of the surface soil was not affected by the fertilization while that of the sub-soil was increased with increased rates of the fertilizer. The CEC of the surface soil was not affected by the fertilizers while that of the sub-soil decreased with increased rates of the fertilizers. The OM and total-N contents of the surface soil tended to increase with increased rates of the fertilizer while those of the sub-soil were not affected by the fertilization. The available P of the surface soil was dramatically increased with increased rates of the fertilizers while that of the sub-soil was less affected. The exchangeable K, Ca and Mg either tended to decrease or significantly decreased with increased rates of the fertilizer, with more pronounced effect in the sub-soil. The DTPA-extractable Fe of the surface soil was increased with increased rates of the fertilizers while that of the sub-soil was not affected by the fertilization. The DTPA-extractable Mn and Zn of the top-layer soil was slightly increased with increased rates of the fertilizer whereas those of the middle-layer soil were similarly decreased by the three application rates of fertilizer and those of the bottom-layer soil were not affected. The DTPA-extractable Cu of soils of the top and middle layers was slightly increased with increased rates of the fertilizer whereas that of the bottom-layer soil was slightly decreased with increased rates of the fertilizer. The bulk density of the surface soils showed slight trends to decrease with increased rates of the fertilizers while that of the sub-soil showed no effect of the fertilizers. The aggregation of the soil was decreased with increased rates of the fertilizers. The hydraulic conductivity of the saturated soils was not affected by the fertilization. The infection on corn roots of arbuscular mycorrhizal fungi (AMF) showed consistent trends to decrease with increased rates of the fertilizer whereas AMF spore intensity in the soil was not affected by low rates of the fertilizer but decreased with increased rates of the fertilizer at high rates of fertilizer. The population of the free-living N2-fixing bacteria in the soil showed consistent trends to increase with increased rates of the fertilizer. The productivity of the soil was increased with increased rates of the fertilizers. |
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