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四种生物覆盖植物的自然分解及养分释放动态

《南京林业大学学报(自然科学版)》[ISSN:1000-2006/CN:32-1161/S]

Issue:
2009年05期
Page:
12
Column:
研究论文
publishdate:
2009-10-20

Article Info:/Info

Title:
Decomposition and nutrient release of four mulching plants in the upland area of Guizhou Province
Author(s):
XIE Baodong12 FANG Shengzuo2* QI Shanding3 LI Huayong1
1.College of Urban and Rural Economics, Linyi University, Linyi 270005, China; 2.College of Forest Resources and Environment, Nanjing Forestry University, Nanjing 210037, China; 3.Guizhou Forestry Department, Guiyang 550001, China
Keywords:
mulching plant decomposition rate halflife nutrient dynamics stability1
Classification number :
S718
DOI:
10.3969/j.jssn.1000-2006.2009.05.003
Document Code:
-
Abstract:
The natural decomposition and nutrient release of four mulching plants were studied using nylon litterbag method from 2004 to 2005, and the twoyear results were as follows: There were some differences in the content of nitrogen, phosphate, potassium and water among four mulching plants. The highest nitrogen and phosphate contents were observed in the leaves of Quercus fabri, reaching 28.50 and 1.77 g/kg respectively, while the highest potassium and water contents were measured in Imperata cylindrical var. major (15.91g/kg) and in the young branch of Coriaria nepalensis(82.70%). During the decomposition of 2year period, decomposition rates of Q.fabri, I.cylindrical, P.aquilinum and C.nepalensis were 96.61%, 100%, 96.49% and 100 %, respectively. However, the decomposition rate was higher in growing season than in nongrowing season, as well as higher in early stage than in late stage. The halflife of Q.fabri was 50day, which is the smallest among four mulching plants, while the biggest halflife was observed in C.nepalensis, reaching 300day. The nitrogenresidue of Q.fabri was the highest among four mulching plants, reaching 17.22 g/kg, while phosphateresidue of I.cylindrical and potassiumresidue of P.aquilinum were the highest, reaching 0.83 g/kg and 4.71 g/kg respectively. The stability of nitrogen, phosphate, potassium content in C.nepalensis was the highest among four mulching plants.

References

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