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문제 정의
- The objective of this study was to compare the effect of sawdust species and steam treatment, for physico-chemical properties and growth of horticultural plant. Also, an experiment was conducted to study the potential of steam treated sawdust as soilless growing media component in production of horticulture plant.
제안 방법
- The objective of this study was to compare the effect of sawdust species and steam treatment, for physico-chemical properties and growth of horticultural plant. Also, an experiment was conducted to study the potential of steam treated sawdust as soilless growing media component in production of horticulture plant.
- This study involves the chemical, physical characterization and growth test of steam treated sawdust (pine and oak) in order to evaluate their use as components of horticultural media. Steamed sawdust showed adequate physical and chemical properties compared to peat moss for their use as growing media.
대상 데이터
- The substrate included pine sawdust, oak sawdust, steamed pine sawdust and steamed oak sawdust. The steam process was performed as follows.
- The pots were allowed to sit in the drained water for 2-3 h into an aluminium trough and the wet weight of the media and the pot was recorded after removing the drained water. Three replications were used in all measurements. Water holding capacity was calculated as:
데이터처리
- Duncan’s multiple comparison range test was used to determine significant differences between the means.
- Obtained data were subjected to analysis of variance to determine the growing media effects. Statistical analysis had been carried out with SAS statistical software and according to analyzing from ANOVA test and comparing data mean to Duncan test. Duncan’s multiple comparison range test was used to determine significant differences between the means.
이론/모형
- The physical properties of the substrate; total porosity and water holding capacity; were measured by Verdonck and Gabriels (Verdonck and Gabriels, 1992) methods. Total porosity is normally calculated from measurements of bulk density.
성능/효과
- Germination of Festuca arundinacea was found to be 34%, 61%, 77%, 76%, 45%, 49%, 80%, and 79%, respectively. Also, germination of Lespedeza cyrtobotrya was found to be 18%, 27%, 38%, 38%, 21%, 39%, 43% and 45% for the PS, PSS10, PSS20, PSS30, OS, OSS10, OSS20, OSS30, respectively (Fig. 1).
- Germination of Brassica campestris L. was found to be 44%, 49%, 53%, 55%, 51%, 57%, 73% and 76% for the PS, PSS10, PSS20, PSS30, OS, OSS10, OSS20, OSS30, respectively. Germination of Festuca arundinacea was found to be 34%, 61%, 77%, 76%, 45%, 49%, 80%, and 79%, respectively.
- was found to be 44%, 49%, 53%, 55%, 51%, 57%, 73% and 76% for the PS, PSS10, PSS20, PSS30, OS, OSS10, OSS20, OSS30, respectively. Germination of Festuca arundinacea was found to be 34%, 61%, 77%, 76%, 45%, 49%, 80%, and 79%, respectively. Also, germination of Lespedeza cyrtobotrya was found to be 18%, 27%, 38%, 38%, 21%, 39%, 43% and 45% for the PS, PSS10, PSS20, PSS30, OS, OSS10, OSS20, OSS30, respectively (Fig.
- Stem length and leaf area were no difference between the substrate for Brassica campestris L. and Lespedeza cyrtobotrya (Fig. 2 and Fig. 3). However, the stem length and leaf area of the steamed sawdust mixture growing media were higher than that of the non-steam treated sawdust mixture growing media for Brassica campestris L.
- In growing media consisting of a mixture of 30 minute of steam treatment time, the germination was similar to that observed in the PM (control). The germination of the Brassica campestris L., Festuca arundinacea and Lespedeza cyrtobotrya cultivated in the non-steam treated sawdust mixtures (pine sawdust, oak sawdust) were clearly lower than that of Brassica campestris L., Festuca arundinacea and Lespedeza cyrtobotrya cultivated with the steamed sawdust mixtures.
- The growth (seed germination, stem length and the leaf area) of Brassica campestris L., Festuca arundinacea and Lespedeza cyrtobotrya was confirmed to be improved (Fig. 1 - Fig. 3).
- These materials are often composted with manure or supplemented with fertilizer to supply the needed nitrogen. The results of this study, it was confirmed that to reduce the C/N ratio with the steam treatment.
- 8%). The total carbohydrate content differed significantly among substrate, with total carbohydrate content of pine sawdust ranging from 32.8 to 29.3%, total carbohydrate content of oak sawdust ranging from 45.1 to 41.7%. The total carbohydrate content of sawdust increased with increasing steam treatment time.
- The total porosity of sawdust and steamed sawdust was presented in Table 2. The total porosity differed significantly among substrate, with total porosity of pine sawdust ranging from 68.1 to 73.8%, total porosity of oak sawdust ranging from 82.5 to 88.9%. The total porosity of sawdust increased with increasing steam treatment time.
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