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 หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Influences of Green Manures and N-fertilizer Management on Nutrient Uptakes and Yield of Cassava on a Degraded Sandy Soil) ผู้เขียน: Pimprapa Sinkumkoon,  ดร.ศุภิฌา ธนะจิตต์, รองศาสตราจารย์ , ดร.สมชัย อนุสนธิ์พรเพิ่ม, รองศาสตราจารย์ , นายเอิบ เขียวรื่นรมณ์, ศาสตราจารย์เกียรติคุณ , Preecha Petprapai, Roongnapa Bowichean สื่อสิ่งพิมพ์:pdf AbstractThe effects of green manures combined with nitrogen fertilizer rates on cassava was studied on a Warin soil, having a very sandy nature, in Nakhon Ratchasima province. Three treatments comprising ruzi grass, sun hemp and no green manure incorporation (local weeds) as a control, were tested in a split-plot design. Four nitrogen rates (0, 7.5, 15 and 22.5 kg.rai-1 N) as subplots were also studied. Ruzi grass as well as local weeds (mainly jungle rice, crabgrass and goat buttons) contained the highest potassium content of 2.32 and 2.16%, respectively, whereas sun hemp consisted of the highest nitrogen content (2.11%). The amounts of available nitrogen released from ruzi grass and sun hemp were almost identical (74.69–75.55 mg.kg-1) and significantly higher than that obtained from local weeds (55.72 mg.kg-1). Green manure had a clear effect on the cassava yield and plant nutrient uptake whereas N fertilizer had none. Sun hemp and local weed gave the highest fresh tuber yield (4.01 and 3.65 t.rai-1) and above-ground biomass (1.34 and 1.13 t.rai-1) of cassava while the starch content was likely to be low, especially in the case of using sun hemp as green manure (30.83%). The cassava yield and above-ground biomass tended to increase with no significant difference but the starch content significantly decreased with increasing rates of N fertilizer. Nitrogen applied at the rate of 22.5 kg.rai-1 N gave the highest fresh tuber yield of 3.50 t.rai-1 of the nitrogen only treatments. Sun hemp green manuring followed by the application of N fertilizer at the rate of 15 kg.rai-1 N gave the significantly highest fresh tuber yield of 4.35 t.rai-1 while the lowest amount of 2.13 t.rai-1 was produced by the plot using ruzi grass as green manure without any additional N fertilizer. |
หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Root Growth and Nutrient Uptake of Rice as Affected by Planting Methods and Green Manures ) ผู้เขียน:Nivat Nabheerong สื่อสิ่งพิมพ์:pdf AbstractField experiment with rice was conducted at IRRI during 1989 wet season. The experimental design was a two?factor randomized complete block with 12 treatments and four replications. Fertilizer N was applied at 60 kg N/ha as 2/3 basal incorporated (B&I) + 1/3 N topdressed at 5-7 days before panicle initiation (DBPI) except for pure green manure treatments where the full N dose as Sesbania rostrala (Sesbania) orAeschynomene afraspera (Aeschynomene) was basally incorporated. Root length density was determined at the flowering and plant nutrient uptake was determined separately by calculating from the product of dry matter, straw dry weight, grain yield and % N, P, K content. Results showed that root growth of broadcast seeded flooded rice (BSFR) was higher at all soil depth than transplanted rice (TPR) as per unit area due to higher plant density and root growth was not disturbed by uprooting. However, on a per tiller basis, root length was significantly lower in BSFR than in TPR at 0-10 cm soil depth which could have partly caused more lodging in BSFR. There were no significant differences among N treatments and no interaction between planting method and N treatment on root growth. However, nonfertilized control gave signifi?cantly higher root-to-shoot ratio than did N-treated plots. Total N uptake in BSFR was higher than that in TPR. Topdressing urea in PU-green manure treatments resulted in higherN uptake at maturity than did green manure applied alone. Phosphorus and K uptake were not significantly differ among the fertilized treatments in both TPR and BSFR at 5-7 DBPI. |
หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Effects of Organic Manures on Production of Lettuce
(Lactuca sativa L.) in Reference to Chemical Fertilizer) ผู้เขียน:Krishna PRASAD PAUDEL, นางสุเทวี ศุขปราการ, รองศาสตราจารย์ , Krung Sidathani, Yongyut Osotsapar สื่อสิ่งพิมพ์:pdf AbstractThe effect of three types of organic manures, its combination within and with chemical fertilizer
was studied under the nylon net house. A lettuce cultivar of ‘Green Fancy’ was grown during December,
2002, February and April 2003. The same amount of nitrogen from organic manures and chemical
fertilizers was applied to the experimental plots for each crop. Cow dung (CD), chicken manure (CM) and
duck manure (DM) were applied 4.5, 4.7 and 5.8 t/ha, respectively, contributing 81 kg nitrogen each. In
the case of combination treatments each combination contributed 1:1 ratio of nitrogen. A treatment with
recommended dose of chemical fertilizer (CF) providing 81 kg nitrogen was also included. The crop
grown with 4.7 t/ha of CM alone and its combination with CF (2.35 ton CM plus 156 kg complete fertilizer
i.e., 15-15-15 together with 82 kg/ha of ammonium sulfate) gave a significantly higher yield throughout
the crop season. Combination treatments within organic manures did not establish any statistical
significance. In spite of the differences in total yield, fiber content and dry matter percentage showed not
significant results irrespective of treatments and crop seasons. |
ที่มา:การประชุมวิชาการแห่งชาติ มหาวิทยาลัยเกษตรศาสตร์วิทยาเขตกำแพงแสน ครั้งที่9หัวเรื่อง:การใช้ปุ๋ยมูลโคและปุ๋ยพืชสดในการผลิตข้าวโพดฝักอ่อนอินทรีย์ |
ที่มา:เรื่องเต็มการประชุมวิชาการดินและปุ๋ยแห่งชาติครั้งที่ 1 : 23-24 เมษายน 2552.มหาวิทยาลัยเกษตรศาสตร์ วิทยาเขตกำแพงแสน.หน้า522-529หัวเรื่อง:(กรุณาย้ายไปหัวข้อผลงานนำเสนอทางวิชาการ) ผลของการใส่มูลสัตว์ร่วมกับปุ๋ยเคมีต่อการเจริญเติบโตและผลผลิตของคะน้า |
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