This experiment was conducted to establish proper irrigation method for water spinach, subtropical vegetable in plastic film house soils to prepare to future global warming of the Korean peninsula. The evaluation of irrigation with 4 different levels as −20, −40, −50 kPa as a starting point(water potential) were compared to –33 kPa as control. All treatments were ended when water potential reached at –10 kPa respectively. The amount of irrigated water, N content, plant growth and fresh yield were investigated. As a result, water potential was correlated positively with irrigation starting point in cultivation period and irrigation times, but the amount water irrigated per time, N content of harvested plant, fresh and dry yield showed negative correlation. The contents of crude protein, P, K, Ca, Fe of harvested part were most high in –50 kPa treatment. We concluded that –50 kPa was optimal irrigation starting point for water spinach cultivation in unheating plastic film house.

‘Hyangdreamchal’, a new early maturing, aromatic and glutinous rice variety was developed by the crop breeding team of Crop Research & Development Division, GARES, Hwaseong, Korea in 2012. ‘Hyangdreamchal’ was derived from a cross between ‘Jinbuchal’ and ‘Miyakaori’ in 2001. This variety headed on July 28 which was 14 days earlier than ‘Hwaseongbyeo’ in Gyeonggi Province. It showed resistance to lodging with strong culm. It's culm length and panicle length were 71 cm and 20 cm, respectively. This variety has 13 tillers per hill and 92 spikelets per panicle. It was medium grain variety and 1,000 grain weight of brown rice was 20.1g. Its cold tolerance was stronger than ‘Hwaseongbyeo’ however it was susceptible to blast virus disease, bacterial leaf blight and insect pest. The milled rice of ‘Hyangdreamchal’ had a glutinous and aromatic endosperm. The yield potential of ‘Hyangdreamchal’ in milled rice was 4.15 MT/ha under the ordinary culture of the local adaptability test in 4 areas of Gyeonggi Province for three years. This variety would be adaptable to the Gyeonggi Province. (품종보호번호 : 제5568호)

벼 재배시 본답의 기비와 분얼비를 대체하여 묘판에 1회 시비하는 용출제어형 입상배합(Bulk Blending) 피복비료를시용 후 벼 생육과 수량, 품질, 경제성 등 완효성비료의 처리효과를 검토한 결과는 다음과 같다.1. 개발된 육묘상비료의 T-N용출량은 온도가 높을수록빨라졌고 온도에 관계 없이 분얼비 시용 시점인 14일경부터 높아져 21일경 최고에 달했다.2. 이앙 후 60일에서 질소흡수이용율은 표준시비 28.6%에 비하여 개발된 육묘상 비료가 높았으며 200 g시비구에서 73.1%, 300 g시비구에서 66.1%로 나타났다.3. 생육단계별(최고분얼기, 유슈형성기 등) 초장, 경수,SPAD값 생육상황은 개발된 육묘상비료 300 g/상자시비에서 표준과 대등하였다.4. 성숙기에도 간장, 수장, 단위면적당 수수는 개발된 육묘상비료 300 g/상자 이상 시비구에서 표준과 같거나많았다.5. 10a당 백미수량은 개발된 육묘상비료 시용량이 많을수록 증가하였다. 시비량별로 보면 표준시비 528 kg대비 개발된 육묘상 비료 300 g/상자 이상 시비구에서525∼552 kg으로 대등하거나 많았다.6. 백미 품질은 개발된 육묘상비료 시용량이 많을 수록 단백질함량은 증가하였으며 완전미율, 아밀로스함량,백도, 투명도는 비료량이 적을수록 증가하는 경향이었다.7. 따라서 표준시비량 이상의 수량과 품질 및 경제적인측면을 고려한 개발된 육묘상 비료의 적정 시비량은300 g/상자(실비. 9 kg/10 a)이었다.8. 시비량은 육묘상비료가 표준시비에 비해 49.3% 절감되었고, 시비노동력도 49.2% 절감되었다.