• Title/Summary/Keyword: Direct Sowing

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Effects of Seeding Dates on Growth and Grain Yield of Direct Seeding Rice on Flooded Paddy Surface in Southern Alpine Area (남부 산간고냉지에서 담수표면직파 시기가 벼 생육 및 수량에 미치는 효과)

  • 김은석;최진용;송근우
    • KOREAN JOURNAL OF CROP SCIENCE
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    • v.42 no.6
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    • pp.699-705
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    • 1997

  • This experiment was conducted to find out an optimum direct seeding date for rice in the southern alpine area of Korea as direct seeding method being considered as the most labor-saving method. A cultivar which was sprouted, Keumobyeo, was sown on the surface of flooded paddy from April 25 to May 15 with 5-day interval. The growth characters such plant height, tiller numbers, yield and its components as well as air temperatures were observed. Earlier sowing showed longer plant height and greater tillers than later sowing. Accumulated temperatures in the different growth stages varied from 1,010 to 1,052$^{\circ}C$ during the period from seeding date to maximum tillering stage, and from 1,785 to 1,846$^{\circ}C$ during the period from seeding to heading dates. The growth of rice sown up to May 5 showed comparatively good when compared to that of machine-transplanted rice, even though the grain yield was not competitive to that of machine-transplanted rice. Highly negative correlation coefficients were found between accumulated temperature during the period of first 30 days after seeding dates and the number of panicles, the number of spikelets per square meter, and grain yield. Regression equation between direct seeding date(X) and yield(Y;MT /ha) was $\hat{Y}$ =3.80990＋0.06207X-0.00174 $X^2$($R^2$=0.704), from which optimum seeding date for direct seeding method in alpine area was estimated to be on April 25 to May 1.

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Determination of the Optimum Harvest Date for Once-Over Harvest of Red Pepper by the Direct Sowing in the Field (노지에 직파한 고추의 일시수확을 위한 적정 시기 구명)

  • 황재문;오세명;심장훈
    • Proceedings of the Korean Society for Bio-Environment Control Conference
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    • 2001.11a
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    • pp.129-135
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    • 2001

  • 농가에서 건초용 고추를 재배하는 일반적인 방법은 온상 육묘한 다음, 서리 피해가 없는 때에 노지에 멀칭 또는 터널을 설치하여 이식재배하고, 서리가 올 때까지의 재배기간 중에 6-8차례에 걸쳐 적과를 수확하여 건조시킨다. 이와 같은 재배방법은 육묘와 수확에 노동력이 많이 투입되므로 고추의 생산비를 낮추기 어렵다. 뿐만 아니라 고온성 작물인 고추를 저온기에 육묘하려면 난방 등 에너지의 비용이 높고 여러 가지의 육묘 자재가 필요하다. (중략)

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An Analysis on Site, Soil and Cultivation Characteristics of Korean Mountain Cultivated Ginseng (Panax ginseng) Field (산양삼 재배지의 입지, 토양 및 재배특성 분석)

  • Kwon, Su-Deok;Kang, Jeong-Hee;Yoon, Jun-Hyuck;Moon, Hyun-Shik
    • Journal of agriculture & life science
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    • v.45 no.6
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    • pp.81-88
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    • 2011

  • This study was carried out to provide basic information for standard cultivation guideline of Korean mountain cultivated ginseng (Panax ginseng). Environmental conditions, soil properties, growth process, cultivation methods and sowing timing were investigated in cultivations of Korean mountain cultivated ginseng in Korea (18 region in 9 province). Most of Korean mountain cultivated ginseng was cultivated to north, north-east, east or north-west direction in broad-leaved forest, IV age group, and 500~1,000 trees/ha. Elevation was below 500 m and slope was below $25^{\circ}$ in cultivation. There were significant differences in soil properties by region and cultivation based on organic matter (3.43~24.07%) and pH level (3.8~5.7). Sprouting, leaf unfolding, flowering, fruiting, red ripening, fruit drop and leaf drop of Korean mountain cultivated ginseng was investigated in cultivation. The results show that it took 98 days on average for the whole growth process. There were two methods, sowing and transplant for cultivation. Sowing methods were classified in sowing after opening-testa treatment and direct sowing. and it was 70% and 30%, respectively.

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A Study on the Variation of Soil Physical Properties on the water requirement, growth, and yield in the direct Sowing culture of rice (수도직파재배에서 토양의 물리성 변화가 용수량과 생육 수량에 미치는 영향에 관한 연구)

  • 김철수;김시원
    • Water for future
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    • v.10 no.2
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    • pp.81-90
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    • 1977

  • The research is conducted to study the effect of the soil physical properties in the direct sowing culture on the water requirement, growth, and yield of rice with Early-Tongil at the experimental paddy field of the Sangju agri. and seri. junior college in Keyngbuk province from 6th May to 15th September in 1977. The experimental plots are designed with the four plots which are non-irrigated standard (plowing to 15cm), non-irrigated deep lowed (plowing to 25cm), irrigated standard (plowing to 15cm), and irrigated deep plowing plot (plowing to 25cm) and also each plot is repreated four times by the split plot design. The results obtained are summarized as follows: 1) The soil sample was ML to 10cm depth from ground surface and those from 10cm to 20cm depth and from 20cm to 30cm were CL. Each specific gravity was 2. 6, 2. 6 and 2. 7. 2) The weather during culturing period was the sane as the normal year of mean temperature. The precipitation was little and the distribution of it was disordered comparing to normal year but the heavy sunshine gave good effect on ripening. 3) Percolation loss was increased more at the non-irrigated plot than at the irrigated plot, and that of deep-plowed plot was increased more. 4) Grain yield per 10a. of non-irrigated deep plowed plot was 898kg, it was greated than others but there wa no significance. 5) A significant difference in the number of spikelets per panicle was found between nonirrigated plot and irrigated plot, and the number of spiklelets per panicle at the nonirrigated plot was more than that of the irrigated plot. But there was no significance in the other yield components-number of panicle, fertility abd ripening ratio-at the irrigated plot, ut weight of 100 grains was higher at non-irrigated plot. 6) Yield and growth at the deep plowed plot were higher than those of standard plowed plot.

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