Effects of Expeller Cake Fertilizer on Soil Properties and Tah Tasai Chinese Cabbage Yield in Organic Greenhouse Farm

Abstract

BACKGROUND: To evaluate the application level of expeller cake fertilizer(ECF), we have investigated soil chemical properties, leaf mineral contents and yield of tah tasai Chinese cabbage in a plastic film greenhouse. METHODS AND RESULTS: Five levels of fertilizer were applied as 0%(ECF 0), 50%(ECF 50), 75%(ECF 75), 100% (ECF 100) and 150%(ECF 150) by base 1,848 kg/ha of ECF. In 2012, tah tasai Chinese cabbage was planted on April 28 in a silt loam soil and harvested on July 12. Commercial yields were measured 10 times from May 10 to July 12. Electrical conductivity (2.24∼3.09 dS/m), available P 2 O 5 (484∼581 mg/kg) and exchangeable cations(K + , Ca 2+ and Mg 2+) were tended to increase by the application of ECF. However, the range of those was not significant. The contents of T-N, K, Ca and P of tah tasai Chinese cabbage leaves were 62.2∼66.5 g/kg, 44.3∼48.7 g/kg, 5.1∼5.9 g/kg and 5.6∼6.2 g/kg, respectively. The nitrogen utilization rate of tah tasai Chinese cabbage was 39.4∼51.6%, and it was decreased with increased application amount of ECF. The yield of tah tasai Chinese cabbage was 9,806 to 12,730 kg/ha on the basis of application amount of ECF and it was not increased in spite of increased ECF. CONCLUSION: The optimum dose of application of ECF for cultivation of tah tasai Chinese cabbage was ranged from 924 kg/ha(as ECF 50) to 1,386 kg/ha(as ECF 75). Environment-friendly and economical amount of applied fertilizer is more important than yield for cultivation of tah tasai Chinese cabbage.

Estimation of Optimum Organic Fertilizer Application under Fertilizer Recommendation System

“…이러한 장점으로 토양검정 시비체계는 유기질 비료의 시용을 결정하는데 이용되었다 (Yoon et al, 2012;Uhm et al, 2012). 그러나 유기질 비료는 무기화 과정을 통해 양분을 작물에 공급하기 때문에 (Alexandratos, 1995;Kim et al, 2014;Tei, 1999), 작물에 대한 유기질 비료 시용효과를 검정할 필요가 있다.…”

Influence of Fertilization Treatment using Organic Amendment based on Soil Testing on Plant Growth and Nutrient use Efficiency in Cabbage

“…작물의 양분이용율은 pH, 토성, 온도, 수분함량, 유기물 종류 등에 따라 달라진다[30].질소의 공급량은 처리 1, 2구 가 234 kg•ha -1 와 210 kg•ha -1 으로 화학비료구 117 kg•ha -1 의 200~180% 이었음에도 불구하고 질소의 이용효율은 20% 내외로 처리구별 차이가 없었다(Fig. 3).…”