Saturday, 15 July 2006
168-16

Study on Nutrition Absorption Pattern of Vegetable Crops with the Height above Sea Level in Korean Highland.

Jeong-Tae Lee, Gye-Jun Lee, Yong-Ik Jin, Chol-Soo Park, and Choon-Soo Lee. National Institute of Highland Agriculture, RDA, Hoeng-gye, Doam, Pyeongchang 232-955, Gangweon, South Korea

Study on Nutrition Absorption Pattern of Vegetable Crops with the Height above Sea Level in Korean Highland

The plant samples of 49 sites for Chinese cabbage, 28 sites for radish, 16 sites for Chinese cabbage, 8 sites for head lettuce, 20 sites for onion from farmers' and experimental fields in alpine region in Korea were collected and then investigated the uptake patterns of nitrogen, phosphorus and potassium nutrient by vegetable plant from 2003 to 2004. The harvest yield of Chinese cabbage in alpine was highest at the above 800m altitude. The dry weight and the uptakes of N, P, and K were increased at higher altitude. The uptakes of available nutrient by Chinese cabbage were 231~283kg ha-1 for N, 71~78kg ha-1 for P2O5 and 175~270kg ha-1 for K2O at the above 800m altitude. But, the yield of Chinese radish in alpine region was higher at the altitude of 600`800m than of 400`600m from 40days after seeding to harvest stage. The dry weight of root and the uptakes of N, P and K by plant were increased at higher altitude. The uptakes by radish plant at high yield in the higher altitude were 139~159kg ha-1 for N, 46~90kg ha-1 for P2O5 and 185~222kg ha-1 for K2O. The yield and the dry weight of head lettuce at harvest stage were higher at altitude of 800~850m than 650~800m, and the content and the uptake of head lettuce plant were increased at higher altitude. The uptakes of N-P2O5-K2O by the lettuce plant at altitude of 800~850m were 93-26-126kg ha-1. The yield of onion at the altitude of 400~600m is similar to that at altitude of 700~800m. And the content and the uptake of nitrogen by onion plant at harvest stage were increased at the altitude of 700~800m. The uptakes of N-P2O5-K2O by onion plant at the altitude of 700~800m were 313-140-234kg ha-1. In case of small cultivation area as leaf vegetable crops free from fertilizer recommendation standard in alpine, we could use the correction factor equivalent to the index of available nutrient uptakes for the determination of N, P and K fertilizer application levels.


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