Characteristics of Nutrient Uptake and Stubble Regrowth of Grain Sorghum in Plastic Film House

• Published in: Korean Journal of Soil Science and Fertilizer Vol. 45; no. 6
• Main Authors: Yun, E.S., National Institute of Crop Science, RDA, Milyang, Republic of Korea, Jung, K.Y., National Institute of Crop Science, RDA, Milyang, Republic of Korea, Park, C.Y., National Institute of Crop Science, RDA, Milyang, Republic of Korea, Hwang, J.B., National Institute of Crop Science, RDA, Milyang, Republic of Korea, Choi, Y.D., National Institute of Crop Science, RDA, Milyang, Republic of Korea, Jeon, S.H., National Institute of Crop Science, RDA, Milyang, Republic of Korea
• Format: Journal Article
• Language: Korean
• Published: 01.12.2012
• Subjects: CORTE; CUTTING; DECOUPAGE; SORGHUM; Stubble regrowth; Uptake
• ISSN: 0367-6315

This study was conducted to get the basic information for absorb enhancement of accumulated soil nutrients in plastic film house. The grain sorghum (Sorghum bicolor L.) was sowing in plastic film house which soil nutrient accumulated moderately and was cutting at major growth period of sorghum. We were analyzed the regrowth pattern, biomass due to cutting time and amount of plant nutrient of grain sorghum. The obtained results were as follows. The heading date after cutting of sorghum in plastic film house was came to about 35 days. The accumulated of plant height were the longest as 379.4 cm in cutting at milk stage. The total biomass of sorghum in cutting at heading stage was 1.73 ton 10a-¹ in cutting at heading stage. The high grain yields were produced with non-cutting and cutting at 10 leaves stage as 75∼113 kg 10a-¹ but the lowest grain yields were the cutting plots at booting stage as below 24 kg 10a-¹. The content of nutrient in sorghum plant was low as progress of growth. The concentrations in aboveground sorghum due to plant parts was in order to leaves greater than panicle greater than stalk. The nitrogen content of sorghum was 0.6∼0.7% in stalk, 1.5∼1.6% in panicle and 1.8∼2.3% in leaves. The amount of nutrient absorbed in sorghum was 4.2 kg 10a-¹ in nitrogen, 1.7 kg 10a-¹ phosphorus and 7.7 kg 10a-¹ in potassium and the absorbing different by cutting time in order to booting greater than non-cutting greater than panicle formation greater-than or equal to milk ripe greater than 10 leaves stage.