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The Matrix’s Nutrient Release in Tropical Orchid Cultivation(PDF)

《北方园艺》[ISSN:1001-0009/CN:23-1247/S]

Issue:
2012年02期
Page:
154-158
Research Field:
Publishing date:

Info

Title:
The Matrix’s Nutrient Release in Tropical Orchid Cultivation
Author(s):
XU Jie; LIN Dian; LIN Jian-ming
College of Agriculture,Hainan University,Danzhou,Hainan 571737
Keywords:
tropical orchid; cultivation matrix; available nutrient; release
PACS:
S 68231
DOI:
-
Abstract:
Pour-Through method was used to explore that pH changed and available nitrogen,phosphorus and potassium released in cultivation matrix of tropical orchid.The results showed that pH of all treatments changed from 524 to 688 during the trial,and that was suitable for most flowers growing.On account of the external environment,sphagnum had great changes about pH which was not suitable for tropical orchid in long-term cultivation.The matrix of nutrient release was not according to certain rules.Mixed matrix had lower nutrient release than pure matrix,which were used to avoid the abuse that pure matrix’s higher nutrient release than mixed matrix.The laws of release about NH4+-N in all treatments followed a similar ‘U’ curve.Volcanic rock mixed pine bark was advantageous to release of NO3--N.Within the first 60 days,there were major changes about available phosphorus in A and B treatments.After 60 days,the contents of phosphorus in A and B decreased until gentle trend.But the releases of phosphorus were low in all mixed matrix as a whole.The release of potassium about A and B dropped gentle release level at 15 and 45 days,and afterwards had been maintained at this gentle level.

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Last Update: 2014-08-24