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Volume 27 Issue 8
Nov.  2012
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Article Contents
LI Fa-lin, HUANG Yan-he, LIN Xiao-lan, ZHENG Yu-ru, CAI Zhi-fa, LIN Yong-xian, YE Ya-hai, WU Ying. Nitrogen and Phosphorus Decomposition of Debris from Orchard Grass[J]. Fujian Journal of Agricultural Sciences, 2012, 27(8): 895-900.
Citation: LI Fa-lin, HUANG Yan-he, LIN Xiao-lan, ZHENG Yu-ru, CAI Zhi-fa, LIN Yong-xian, YE Ya-hai, WU Ying. Nitrogen and Phosphorus Decomposition of Debris from Orchard Grass[J]. Fujian Journal of Agricultural Sciences, 2012, 27(8): 895-900.

Nitrogen and Phosphorus Decomposition of Debris from Orchard Grass

  • Received Date: 2012-04-16
  • Rev Recd Date: 2012-05-20
  • Publish Date: 2012-08-30
  • Grass residues and decomposition of nitrogen and phosphorus in grassing orchards were studied by using the harvest quadrat method. The residues of the 4 grasses, Chamaecrista rotundifolia,Paspalum natatum, Paspalum wetsfeteinii and Borreria latisolia, were 406.00, 1 582.28, 1 542.62 and 658.07 g, respectively, accounting for 33.8%, 76.1%, 59.4%, and 100.0% of the total, respectively. The half-decomposition time of the grass residues was 5 months for P. natatum, C. rotundifolia and B.latisolia, while 6 months for P.wetsfeteini. The nitrogen storage of the annual losses of the 4 grass residues were 90.86%, 67.76%, 88.45% and 88.33%, respectively, which equated the annual losses of orchard nitrogen of 81.16, 119.02, 219.68 and 58.71 kg穐m-2, respectively. These were far less than 864 kg穐m-2.The phosphorus storage of the annual losses of the 4 grass residues were 84.46%, 80.32%, 90.90% and 87.22%, respectively, which equated the annual losses of orchard phosphorus of 167.69, 534.96, 604.49 and 343.22 kg穐m-2, respectively. These were less than the amount of adsorbable phosphorus in the cultivated soil.
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