 |
 |
|
|
|
 |
|
|
|
 |
 หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Fertility Improvement of Sandy Soil by Vetiver Grass Mulching and Compost) ผู้เขียน: ดร.นวลฉวี รุ่งธนเกียรติ, ศาสตราจารย์ ,  Prapai Chairoj, Sunthorn Chookhao สื่อสิ่งพิมพ์:pdf AbstractTo improve the productivity and fertility of Hupkapong sandy soil, fresh vetiver grass was used in mulching and vetiver grass compost was applied in combination with chemical fertilizer. Soil fertility and productivity were evaluated from the yields of Insee 1 super sweet corn hybrid grown on the soil, and soil moisture determined using a neutron probe. The results indicated that super sweet corn hybrid gave a maximum growth and yield when it was fertilized with 75-75-75 kg N-P2O5-K2O ha-1 in combination with soil mulching of 31.25 t ha-1 of fresh vetiver grass. Reducing the application of N-chemical fertilizer and vetiver mulching by 50% resulted in a decrease in super sweet corn hybrid yields. This decrease, however, was not statistically significant. Mulching was found to conserve topsoil moisture and increase plant growth and production. Soil incubated with vetiver grass or its compost released approximately the same amount of available-N. However, fresh vetiver grass mineralized higher levels of available-P and extractable-K than vetiver grass compost. One ton of vetiver grass yielded 1.32 kg t-1, 0.24 kg t-1 and 6.73 kg t-1 of available-N, available-P and extractable-K, respectively. |
หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Tillage and Mulching Affect on Growth and Yield of Cowpea Grown Following Rice in the Post-Monsoon Season of Northeastern Thailand) ผู้เขียน:Anan Polthanee, Sadudee Wannapat สื่อสิ่งพิมพ์:pdf AbstractField studies were conducted to assess the effects of tillage and no-tillage with and without mulch on the growth and yield of cowpea grown following rice in the post-monsson season of Northeastern Thailand. The results showed that growth and yield of cowpea were not significantly affected by tillage. There was slightly higher seed yields in tilled plots. This was attributed to tillage operation which is known to improve soil aeration. Mulch application significantly increased the leaf area per plant, total top dry weights, tap root length, root dry weight per plant and seed yield of cowpea. This was due to the better ability of mulched plots in storing soil moisture during the growing season. |
หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Soil and water conservation on steep slopes by mulching using rice straw and vetiver grass clippings) ผู้เขียน:ดร.สมชาย ดอนเจดีย์, รองศาสตราจารย์ , Tawatchai Tingsanchali สื่อสิ่งพิมพ์:pdf AbstractThis research investigated the performance of mulching using rice straw mulch (RC) and vetiver grass clippings as mulch (VGM) in reducing soil loss and runoff during the early stages of cultivation on an agricultural area. The effects of the rainfall intensity and mulch rate in conserving runoff and trapping sediment were determined by field experiments on land with a steep 30% slope. Three rainfall intensities of 35 mm/h, 65 mm/h and 95 mm/h were applied using an artificial rainfall simulator. The effects of five mulch rates (1.0, 1.5, 2.5, 5.0 and 7.5 t/ha) with conventional tillage were compared with un-mulched treatment. Both VGM and RC showed good potential for reducing runoff and soil loss. For a given rainfall intensity of 65 mm/h and a mulch rate of 1.5 t/ha, RC reduced runoff and soil loss less than VGM. For higher mulch rates, RC performed better than VGM. For example, at the 5.0 t/ha mulch rate, RC reduced runoff and soil loss by about 47.5% and 62.9%, respectively, compared to VGM with a corresponding reduction of 42.4% and 53.7%, respectively. It is recommended that application of 5.0 t/ha of RC or 7.5 t/ha of VGM is the most suitable for soil and water conservation. |
หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Decomposition of Vetiver Shoot and Effect of Vetiver Mulching on
Super Sweet Corn Hybrid Yield) ผู้เขียน:Prapai Chairoj, ดร.นวลฉวี รุ่งธนเกียรติ, ศาสตราจารย์ สื่อสิ่งพิมพ์:pdf AbstractTwo experiments were conducted on Hupkapong Soil Series. In the first experiment, the
decomposition of vetiver shoot, and the nutrients released during the process were measured. The second
experiment investigated the mulching effect of vetiver shoot on yield of super sweet corn hybrid in the
wet and dry seasons. The results from the decomposition study indicated that, within 90 days, more than
80% of the buried vetiver shoot decomposed but less than 30% of the same material left on soil surface
disintegrated. It was also found that one ton of dry vetiver shoot buried at the depth of 10 cm would yield
mineral nitrogen, available phosphorus, and extractable potassium up to 4.4, 2.2 and 20.5 kg while that
left on soil surface would yield only 0.85, 0.74 and 7.20 kg, respectively. In the second experiment, the
application of 31.25 t/ha fresh weight of vetiver shoot for mulching in addition to a half rate (35.5-35.5-
35.5 kg of N-P2O5-K2O/ha) of the recommended fertilization produced the same yield of super sweet corn
hybrid as applying the full rate of the recommended fertilizer alone. Mulching the soil with vetiver shoot,
therefore, could reduce 50% of chemical fertilizer needed for the super sweet corn hybrid production. |
|
|
|
|
|
|