Weed and Pest Control by Means of Physical Treatments;Effect of infrared irradiation on loam for weed control

물리적인 방법을 이용한 잡초 및 병해충 방제 방법의 개발;적외선 조사에 의한 잡초방제를 위한 양토의 가열 효과

  • Kang, Whoa-Seug (Dept. of Arg.Mech., Coll. of Arg. & Life Sciences, Kangwon Nat'l Univ.) ;
  • Yu, Chang-Yeon (School of the Plant Application Science, Kangwon Nat'l Univ.) ;
  • Shin, Hyun-Dong (Dept of Hort., Kangnung Nat'l Univ.) ;
  • Kang, Wie-Soo (Dept. of Arg.Mech., Coll. of Arg. & Life Sciences, Kangwon Nat'l Univ.) ;
  • Oh, Jae-Heun (Dept. of Arg.Mech., Coll. of Arg. & Life Sciences, Kangwon Nat'l Univ.)
  • 강화석 (강원대학교 농업기계공학과) ;
  • 유창연 (강원대학교 식물응용과학부) ;
  • 신현동 (강릉대학교 원예학과) ;
  • 강위수 (강원대학교 농업기계공학과) ;
  • 오재헌 (강원대학교 농업기계공학과)
  • Published : 1996.03.31

Abstract

The viability loss or death of weed seeds buried in soil can be induced by infrared irradiation which has good penetration in moist soil. By using this principle of pre-emergence soil-treatment, the study was carried out to obtain basic information needed to develop the effective weed control method for the production of less polluted agricultural products. An apparatus for irradiating infrared was constructed by using ceramic material with high emissivity. The LPG was used as fuel for producing infrared by heating ceramic material. The soil heated in this study was loam with four levels of moisture contents (0.6, 5.7, 10.7, 15.1 % wb). The temperature distribution was measured at various soil depths when soil with different moisture content was irradiated with infrared for three different times (30, 60, 90 sec). The soil depths with duration time of minimum 3 minutes over $80^{\circ}C$, temperature inducing viability loss of weed seeds, were investigated. When the moisture content of soil was 0.6 and 5.7 % wb, the soil depths which can induce viability loss of weed seeds was greatly increased with increasing irradiation time. However, any depths of soil tested in this study was not reached to the temperature of $80^{\circ}C$ when 30 seconds of irradiation time was applied on soil with moisture content of 10.7 or 15.1 % wb. Generally, the soil depth needed for viability loss of weed seeds was decreased with increasing moisture content of soil. Also, longer irradiation time was required to induce viability loss of weed seeds with increasing moisture content of soil.

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