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최종명,Ahmed Latigui,Chiwon W. Lee 한국원예학회 2013 Horticulture, Environment, and Biotechnology Vol.54 No.1
‘Seolhyang’ strawberries (Fragaria ananassa Duch.) were grown in a soilless substrate with fertigation solutions to evaluate the effects of six different P concentrations (0, 0.5, 1, 2, 4, and 6 meq·L-1) on the growth and nutrient contents in dry matter of above-ground tissue and petiole sap. The changes in electrical conductivity (EC) and pH of the root substrate were also investigated. Deficient and excess concentrations of phosphorus, such as 0 and 6 meq·L-1, seriously restricted the plant growth. These two treatments showed the least values in leaf number, plant height, leaf length and width, petiole length, and fresh and dry weights. The solution containing 1 meq·L-1 of phosphorus showed the greatest plant growth compared to the other treatments. The macro-element contents such as P, K, Ca, and Mg showed increased tendencies as P concentrations were elevated but, micro-elements such as Fe and Mn showed decreased tendencies in dry matter of above-ground tissue. When P concentrations were elevated, the pH and EC in the soil solution of root substrate decreased. Considering the crop growth and tissue nutrient contents, the P concentrations should be between 0.5 to 2.0 meq·L-1 and the P contents in the dry matter and petiole sap were 0.23 to 0.62% and 205 to 305 mg·kg-1.
Jong Myung Choi(최종명),Ahmed Latigui(아흐메드 라티기),Moo Kyung Yoon(윤무경) 한국원예학회 2010 원예과학기술지 Vol.28 No.5
This research tested five modified Hoagland solutions for proper fertility management of nitrogen in ‘Seolhyang’ strawberry cultivations. The changes of nutrient solutions were in total nitrogen concentrations (meqㆍL?¹) such as 0 (NO?₃), 2.5 (NO₃?), 5 (NO₃?), 10 (7.5NO₃? + 2.5NH₄?) and 15 (10NO₃? + 5NH₄?). The fresh weight and NO₃-N concentrations in petiole sap responded to the elevated nitrogen concentrations in fertilizer solution in quadratic (y=7.10+2.668x-0.115x², R²=0.7983***) and linear (y=26.14+5.245x, R²=0.6083***), respectively. The dry weight and N content of the above ground plant tissue responded to the elevated nitrogen in quadratic (y=2.140+0.492x-0.022x², R²=0.6110***) and linear (y=0.569+0.033x, R²=0.6952***), respectively. In our experiment the solution with 5 meqㆍL?¹ of NO₃? showed positive results in both dry and fresh weight productions. However, a future research about modification of this solution and growth and nutrient uptake response is necessary to achieve better growth of ‘Seolhyang’ strawberry.
‘설향’ 딸기 번식을 위한 자루재배시 상토의 물리·화학성이 모주 생육과 자묘 발생에 미치는 영향
최종명(Jong Myung Choi),박지영(Ji Young Park),라티기(Ahmed Latigui) 한국원예학회 2011 원예과학기술지 Vol.29 No.2
The influence of physicochemical properties of root substrates on the growth of mother plants and occurrence of daughter plants in ‘Seolhyang’ strawberry propagation were investigated through plastic bag cultivation. Six different formulations of root substrates were coir dust + perlite (5:5, A), coir dust + perlite (6:4, B), coir dust + perlite (7:3, C), coir dust + coconut chip (7:3, D), coir dust + coconut chip (6:4, E), and peatmoss + vermiculite (5:5, v/v; F). The total porosities (TP) and container capacities (CC) of all root substrates were higher than 85% and 55%, respectively, indicating that all substrates were in the acceptable range. But the TP and CC of F substrate were 91.5% and 60%, respectively, which were the highest among the root substrates tested. In the soil chemical properties analyzed before planting and after harvesting of ‘Seolhyang’ strawberry mother plants, the root substrates of A, B, C, and F had higher electrical conductivity and NO3-N concentrations than those of D and F. The root substrates of A, B, C, and F had heavier runner fresh and dry weights, longer runner lengths, and more daughter plant occurrence than those of D and F. The treatment F had higher tissue N content than any other treatments at 120 days after the transplanting of ‘Seolhyang’ strawberry and statistical differences were not observed among remained 5 substrates. The treatment of F also had the higher tissue contents of other nutrients except N analyzed at 120 days after transplanting. These results indicated that soil chemical properties rather than physical properties severely influenced the growth of runners and occurrence of daughter plants.