EFFECTS OF REMOVAL OF ORGANIC-MATTER ON THE PRODUCTIVITY OF HEATHLANDS

被引：16

作者：

DIEMONT, WH

机构：

[1] Research Institute for Forestry and Nature Research, Wageningen, 6700 AA

来源：

JOURNAL OF VEGETATION SCIENCE | 1994年 / 5卷 / 03期

关键词：

CALLUNA-VULGARIS; DESCHAMPSIA-FLEXUOSA; GAP; MILLING; MOLINIA-CAERULEA; MOWING; NUTRIENT; SOD CUTTING;

D O I：

10.2307/3235864

中图分类号：

Q94 [植物学];

学科分类号：

071001 ;

摘要：

Effects of milling, mowing and sod cutting on productivity in a Deschampsia grass heath and a Molinia-Deschampsia grass heath were studied from 1977 to 1986. The sum of above-ground biomass, litter and accumulated humified matter (TOM) in both types was ca. 70 ton/ha and the primary productivity 3 - 5 ton ha-1 yr-1. Mulching did not affect the annual production. Sod cutting reduced the productivity to 1 - 2 ton ha-1 yr-1; on the Molinia-Deschampsia site this reduction lasted for at least a decade, while the Deschampsia heath started to recover from sod cutting soon and increased in productivity again. Annual mowing both with and without removal of hay reduced the production as well, particularly on the Molinia-Deschampsia heath. Lower production was either the result of phosphorus depletion - Molinia-Deschampsia site - or nitrogen depletion - Deschampsia site. In the mowing treatments there was also a depletion of carbohydrate reserves.

引用

页码：409 / 414

页数：6

共 32 条

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