등가 이온 총량에 따른 EC 추정과 이온 균형 모형

To examine the EC model in a culture medium, basic culture medium of Rush (2005) and EC model of Robinson and Strokes (1959) were applied analyzing the equivalence ion total amount, the EC variable of cation and anion. Following the experiential translation by Steiner (1980), 130 optimized domestic and foreign culture media for crop growth were utilized, and estimated EC model was also demonstrated. Results from basic culture medium of Rush (2005) suggests an estimated EC by equivalence ion total amount and high reliable regressive model with 0.96 y = 1.33x - 0.23 of 0.96 as value $R^2$. It was found out that the change in concentration of positive ion and anion did not differ significantly with the increase and decrease of EC, however, there occurred a slight variable range. The change brings about a bigger anion influence than the previously reported positive ion, seemingly like those based on nitride ion and sulfur ion. The above EC estimated models confirmed that with optimized 130 domestic and foreign culture media for crop growth, the value derived will be as follows: $R^2$ = 0.98 with y = 1.23x - 0.02. In addition, the contour analysis of positive ion and anion for EC, with popularly known concentration range of EC $1.5-2.5dS{\cdot}m^{-1}$ reveals an equivalent of more than $11meq{\cdot}L^{-1}$ for positive ion and $15meq{\cdot}L^{-1}$ for anion. On the other hand, the left bottom, low concentration $1.5dS{\cdot}m^{-1}$ and the right above, high concentration $2.5dS{\cdot}m^{-1}$, for both positive ion and anion existed differently in a proper culture medium concentration. This study adapted variables of both positive ion and anion of EC simultaneously, unlike in the previous culture medium by ion ratio in mutual ratio of Steiner (1980), and offers an EC model that can estimate levels or positive ion and anion in proper concentration, EC $1.5-2.5dS{\cdot}m^{-1}$, with distributed features of ions. 본 시험은 배양액 내 EC 모형을 구명하기 위해 Rush(2005)의 기본 배양액을 설계하여 Robinson and Strokes(1959)의 등가이온총량에 따라 EC 모형을 추정하고, 양이온과 음이온 및 무기이온간의 EC 변량에 대하여 분석하였다. Steiner(1980)의 경험적 해석을 위해 작물 생육에 최적화된 국내외 130종 배양액을 사용하여 EC 추정 모형을 실증하였다. Rush(2005)의 기본 배양액을 등가이온총량으로 EC 추정한 결과 $R^2$ 값 0.96의 y = 1.33x - 0.23의 신뢰성 높은 회귀모형을 추정하였다. 양이온과 음이온의 농도 변화가 EC의 증감 변화와 일치하지만 그 평면적으로 변화하지 않고 변량폭을 보였다. 그 변화는 기존에 보고된 양이온의 영향보다 음이온의 영향이 더 큰 것으로 나타났는데, 질소 이온과 황이온에 기인한 것으로 생각된다. 이상의 EC 추정 모형을 작물 생육이 최적화된 국내외 130종의 배양액을 이용하여 재확인하였는데, $R^2$ = 0.98의 y = 1.23x - 0.02를 나타냈다. 또한 EC에 대한 양이온과 음이온의 contour 분석