Fig. 4 Flow chart of pentosan analysis – Orcinol spectrophotometric method.

聚戊醣析法圖—間苯二甲酚光度法。

Fig. 4 Flow chart of pentosan analysis - Orcinol spectrophotometric method.

聚戊醣析法图—间苯二甲酚光度法.

In different harvesting seasons, the lignin, holocellulose and pentosan contents in bamboos didn''t change too much.

至于同为化学主要组成的质素、全纤维素、聚戊醣等成，则没有季节变化。

That means the birch from high longitude and latitude areas will have lower content of the ash, extraction and lignin, higher content of the holocellulose and pentosan in the wood.

这表明，选择较高经纬度地区的白桦，可以降低、出物、素含量，提高综纤维素和聚戊糖含量。

Fig. 4 Flow chart of pentosan analysis – Orcinol spectrophotometric method.

醣分析法流程圖—間苯二甲酚光度法。

Fig. 4 Flow chart of pentosan analysis - Orcinol spectrophotometric method.

醣分析法流程图—间苯二甲酚光度法.

In different harvesting seasons, the lignin, holocellulose and pentosan contents in bamboos didn''t change too much.

至于同为化学主要组成分的质素、全纤维素、醣等成分，则没有季节变化。

That means the birch from high longitude and latitude areas will have lower content of the ash, extraction and lignin, higher content of the holocellulose and pentosan in the wood.

这表明，选择较高经纬度地区的白桦，可以降低灰分、抽出物、素，提高综纤维素和。

Fig. 4 Flow chart of pentosan analysis – Orcinol spectrophotometric method.

醣分析法流程圖—間苯二甲酚光度法。

Fig. 4 Flow chart of pentosan analysis - Orcinol spectrophotometric method.

醣分析法流程图—间苯二甲酚光度法.

In different harvesting seasons, the lignin, holocellulose and pentosan contents in bamboos didn''t change too much.

至于同为化学主要组成分的质、全纤维、醣等成分，则没有季节变化。

That means the birch from high longitude and latitude areas will have lower content of the ash, extraction and lignin, higher content of the holocellulose and pentosan in the wood.

这表明，选择较高经纬度地区的白桦，可以降低灰分、抽出物、，提高综纤维和糖。

Fig. 4 Flow chart of pentosan analysis – Orcinol spectrophotometric method.

聚戊醣分析法流程圖—間苯二甲酚光度法。

Fig. 4 Flow chart of pentosan analysis - Orcinol spectrophotometric method.

聚戊醣分析法流程图—间苯二甲酚光度法.

In different harvesting seasons, the lignin, holocellulose and pentosan contents in bamboos didn''t change too much.

至于同为化学主要组成分的质素、全素、聚戊醣等成分，则没有季节变化。

That means the birch from high longitude and latitude areas will have lower content of the ash, extraction and lignin, higher content of the holocellulose and pentosan in the wood.

这表明，选择较高经纬度地区的白桦，可以降低灰分、抽出物、素含量，提高素和聚戊含量。

Fig. 4 Flow chart of pentosan analysis – Orcinol spectrophotometric method.

聚戊醣析法流程圖—間苯二甲酚光度法。

Fig. 4 Flow chart of pentosan analysis - Orcinol spectrophotometric method.

聚戊醣析法流程图—间苯二甲酚光度法.

In different harvesting seasons, the lignin, holocellulose and pentosan contents in bamboos didn''t change too much.

至于同为化学主要组成、全纤维、聚戊醣等成，则没有季节变化。

That means the birch from high longitude and latitude areas will have lower content of the ash, extraction and lignin, higher content of the holocellulose and pentosan in the wood.

这表明，选择较高经纬度地区白桦，可以降低灰、抽出物、含量，提高综纤维和聚戊糖含量。

Fig. 4 Flow chart of pentosan analysis – Orcinol spectrophotometric method.

聚戊醣分析法流程圖—間苯二甲酚光度法。

Fig. 4 Flow chart of pentosan analysis - Orcinol spectrophotometric method.

聚戊醣分析法流程图—间苯二甲酚光度法.

In different harvesting seasons, the lignin, holocellulose and pentosan contents in bamboos didn''t change too much.

至于同为化学主分的质素、素、聚戊醣等分，则没有季节变化。

That means the birch from high longitude and latitude areas will have lower content of the ash, extraction and lignin, higher content of the holocellulose and pentosan in the wood.

这表明，选择较高经纬度地区的白桦，可以降低灰分、抽出物、素含量，提高综素和聚戊糖含量。

Fig. 4 Flow chart of pentosan analysis – Orcinol spectrophotometric method.

聚戊醣析法流程圖—間苯二甲酚光度法。

Fig. 4 Flow chart of pentosan analysis - Orcinol spectrophotometric method.

聚戊醣析法流程图—间苯二甲酚光度法.

In different harvesting seasons, the lignin, holocellulose and pentosan contents in bamboos didn''t change too much.

至于同为化学主要组、纤维、聚戊醣等，则没有季节变化。

That means the birch from high longitude and latitude areas will have lower content of the ash, extraction and lignin, higher content of the holocellulose and pentosan in the wood.

这表明，选择较高经纬度地区白桦，可以降低灰、抽出物、含量，提高综纤维和聚戊糖含量。

Fig. 4 Flow chart of pentosan analysis – Orcinol spectrophotometric method.

聚戊醣分析法流程圖—間酚光度法。

Fig. 4 Flow chart of pentosan analysis - Orcinol spectrophotometric method.

聚戊醣分析法流程图—间酚光度法.

In different harvesting seasons, the lignin, holocellulose and pentosan contents in bamboos didn''t change too much.

至于同为学主要组成分的质素、全纤维素、聚戊醣等成分，则没有季。

That means the birch from high longitude and latitude areas will have lower content of the ash, extraction and lignin, higher content of the holocellulose and pentosan in the wood.

这表明，选择较高经纬度地区的白桦，可以降低灰分、抽出物、素含量，提高综纤维素和聚戊糖含量。

Fig. 4 Flow chart of pentosan analysis – Orcinol spectrophotometric method.

醣分析法流程圖—間苯二甲酚光度法。

Fig. 4 Flow chart of pentosan analysis - Orcinol spectrophotometric method.

醣分析法流程图—间苯二甲酚光度法.

In different harvesting seasons, the lignin, holocellulose and pentosan contents in bamboos didn''t change too much.

至于同为化学主要组成分的质、全纤维、醣等成分，则没有季节变化。

That means the birch from high longitude and latitude areas will have lower content of the ash, extraction and lignin, higher content of the holocellulose and pentosan in the wood.

这表明，选择较高经纬度地区的白桦，可以降低灰分、抽出物、，提高综纤维和糖。