Natural variation in the glucose content of dilute sulfuric acid–pretreated rice straw liquid hydrolysates: implications for bioethanol production

Figures & data

Table 1. The analysis of variance table for two-way analysis of variance.

	Sum square	Df	F value	P value
Subspecies	7.38	1	1.1001	0.2949
Year	3.32	1	0.4942	0.4825
Subspecies:year	1.35	1	0.2007	0.6544
Residual	2,590.44	386

Notes: Df: Degree of freedom.

Fig. 1. Frequency distributions of the liquid hydrolysate glucose content in 208 rice cultivars in 2013 (a) and 2014 (b).

Fig. 2. Frequency distributions of the liquid hydrolysate glucose content in (a) japonica rice cultivars in 2013, (b) indica rice cultivars in 2013, (c) japonica rice cultivars in 2014, and (d) indica rice cultivars in 2014.

Fig. 3. Liquid hydrolysate glucose content of 208 rice cultivars in 2013 and 2014 (a) and relationships of liquid hydrolysate glucose content and total glucose content in rice straw in 2014 (b).

Fig. 4. Temperature and solar radiation at the Kobe University, Food Resources Education and Research Center (Kasai, Hyogo Prefecture, Japan). Lines show the temperature in 2013 and 2014. Bars show the difference in solar radiation (the value in 2014 minus that in 2013).

Fig. 5. Upper and lower quartiles of glucose content in 2013 and 2014. Error bars show standard deviation.