336-3 Application Effects of Sweet Sorghum Bagasse On Growth, Yield and N Uptake in Komatsuna.

Poster Number 1249

See more from this Division: S08 Nutrient Management & Soil & Plant Analysis
See more from this Session: Managing Nutrients in Organic Materials and by-Products
Wednesday, November 3, 2010
Long Beach Convention Center, Exhibit Hall BC, Lower Level
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Naomi Asagi1, Takashi Homma1, Youji Nitta1, Eiichi Inoue1, Kazuhiko Narisawa1, Toshiaki Matsuda1, Yasurou Kurusu1, Satoshi Nakamura2 and Yusuke Goto3, (1)College of Agriculture, Ibaraki University, Ami-machi, Ibaraki, Japan
(2)School of Food, Agricultural and Environmental Sciences, Miyagi University, Sendai, Miyagi, Japan
(3)Graduate School of Agricultural Science, Tohoku University, Sendai, Miyagi, Japan
The effects of sweet sorghum bagasse (SSB) application on komatsuna growth, yield and N uptake were investigated and compared with those of surface-applied rice straw (RS), inorganic fertilizer (IF) or no fertilizer (NF) application. Komastuna (Brassica rape L. perviridis Group) is a typical and Japanese leafy vegetable that is often employed as an experimental crop. SSB were either incorporated into or surface-applied on upland soil. Wagner pots (0.02 m2) containing 1.6 kg dry soil were fertilized with inorganic fertilizer (N: P2O5: K2O = 15: 15: 15 g m-2) in each treatment except for NF, SSB (1t dry weight m-2, TC 45.1%, TN 0.347%, C/N 133) in the SSB-applied treatments and RS (1t dry weight m-2, TC 39.0%, TN 0.506%, C/N 77.0) in the RS-applied treatment. The SSB C/N ratio was higher than that of the RS. On April 18, 2010, after application of IF, SSB and RS, nine seed of komatsuna were seeded in each pot and thinned to three seedlings at 11 days after sowing. The cultivation was conducted in greenhouse with four replications. At 21 days after sowing (DAS), the plant height and number of leaves of komatsuna were significantly lower in NF treatment than those in the other treatments. There were no significant differences in the leaf chlorophyll content index among all treatments. Each komatsuna growth index (plant height, number of leaves, and leaf chlorophyll content) in the SSB applied treatments was not significantly different from that in the IF and RS applied treatment at 21 DAS. Therefore, the negative application effects of SSB, one of the organic matters with high C/N, on komatsuna growth at 21 DAS were not observed. Further studies are necessary to evaluate the effect of sweet sorghum bagasse application in soil on komatsuna yield and N uptake.
See more from this Division: S08 Nutrient Management & Soil & Plant Analysis
See more from this Session: Managing Nutrients in Organic Materials and by-Products