CAJ | 학술논문

取苗成功率和取苗质量除了与取苗机构的结构有关外,苗钵的力学特性也是重要的因素. 为此,对番茄苗钵进行了顶出力和抗压性能试验,分析了不同基质含水率、顶杆直径和顶苗速度对顶出率的影响,并通过试验建立了基质苗在不同含水率下的抗压力与压缩量的变化曲线. 结果表明:顶苗速度、顶杆直径和基质含水率对顶出率的显著性影响程度由大到小依次为 B、C、A;随着基质含水率的上升、顶杆直径的减小,顶出率会逐渐下降;在含水率为35.09%、顶杆直径为8mm 时,顶出率达到100%;在含水率为57.23%、顶杆直径为5mm 时,顶出率最低,仅为81.25%;基质块抗压力随压缩量的增加呈加速上升趋势,在压缩量到达12mm 时,3 种含水率下的抗压力分别为48.89、43.87、35.85N. 此研究结果为取苗机构的设计提供了理论依据.
취묘성공솔화취묘질량제료여취묘궤구적결구유관외,묘발적역학특성야시중요적인소. 위차,대번가묘발진행료정출력화항압성능시험,분석료불동기질함수솔、정간직경화정묘속도대정출솔적영향,병통과시험건립료기질묘재불동함수솔하적항압력여압축량적변화곡선. 결과표명:정묘속도、정간직경화기질함수솔대정출솔적현저성영향정도유대도소의차위 B、C、A;수착기질함수솔적상승、정간직경적감소,정출솔회축점하강;재함수솔위35.09%、정간직경위8mm 시,정출솔체도100%;재함수솔위57.23%、정간직경위5mm 시,정출솔최저,부위81.25%;기질괴항압력수압축량적증가정가속상승추세,재압축량도체12mm 시,3 충함수솔하적항압력분별위48.89、43.87、35.85N. 차연구결과위취묘궤구적설계제공료이론의거.
Besides the structure factor of pick-up seedling mechanism, the mechanical properties of seeding was also im-portant factor.Push-out force and compressive properties test of tomato seedling was made in order to analyze the influ-ence rule of the factors of water content, diameter of mandril,and push-out speed on push-out rate.And got the chan-ging curve between compressive resistance and compression of seedling pot in the different water content.The results showed the moisture content and mandril diameter had significant effect on the push -out rate, but the push-out speed had no significant effect on it.The push-out rate decreased with the incerease of moisture content and the decrease of mandril diameter.The push-out rate achieve 100% was substrate at 35.09% moisture content, meanwhile the mandril diameter was 8mm.The push-out rate was only 81.25% when substrate at 35.09% moisture content, meanwhile the mandril diameter was 5mm.Compressive resistance of the capacity was accelerated increasing with the increase of com -pression, and the pressure force was 48.89N, 43.87N, 35.85N when the compression reach 12mm at the three mois-ture content.The study results provided the theoretical basis for the the pick-up seedling mechanism.