Article | 8. 2016 Vol. 34, Issue. 4
Effects of Crotalaria Incorporation into Soil as a Green Manure on Growth of Strawberry and Inorganic Soil Nitrogen Level

Horticultural and Herbal Crop Environment Division, National Institute of Horticultural & Herbal Science1
Department of Horticultural Science, Mokpo National University2

2016.8. 578:586


In this study, we evaluated the effects of soil incorporation of crotalaria as a green manure on the growth and yields of ‘Seolhyang’ strawberry and inorganic soil nitrogen levels in a greenhouse. Four different N treatments were used, as follows: zero N fertilizer (control), crotalaria, crotalaria with 50% urea, and 100% urea. The recommended N requirement (100% urea) for strawberry was 86 kg N·ha-1 and 50% of the recommended N (50% urea) was 43 kg N·ha-1. Crotalaria was sowed on June 17th, 2011 and cultivated for 37 days. The amount of N supply from soil incorporation of crotalaria was 104 kg N·ha-1. Strawberry was planted on September 9th, 2011 and cultivated for 255 days after planting. The concentrations of soluble solids and acidity of strawberry fruits for the crotalaria treatment were higher than for the crotalaria with 50% urea and 100% urea treatments. On the other hand, the growth and yield of strawberry was the highest for the crotalaria with 50% urea and 100% urea treatments, followed by the crotalaria treatment, and the lowest for the control. Soil inorganic N concentration for the crotalaria treatment was continuously decreased to 24 mg·kg-1 at the end of the growing season, while crotalaria with 50% urea and 100% urea treatments maintained an inorganic N concentration that ranged from 35 to 50 mg·kg-1. These results indicate that the amount of N supply from soil incorporation of crotalaria may not be enough because strawberry yield was lower than for other N treatments. Therefore, additional nitrogen, such as 50% urea after soil incorporation of crotalaria, is recommended.

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