摘要
ＥｃｏｌｏｇｉｃａｌＥｆｆｅｃｔｓｏｆＬａｎｄＵｓｅＰａｔｔｅｒｎｓｉｎＲｅｄＳｏｉｌＨｉｌｌｙＲｅｇｉｏｎＷＡＮＧＸＩＡＯ－ＪＵａｎｄＧＯＮＧＺＩ－ＴＯＮＧ（ＩｎｓｔｉｔｕｔｅｏｆＳｏｉｌＳｃｉｅｎｃｅ，ＡｃａｄｅｍｔａＳｉｎｉｃａ，Ｐ．Ｏ．Ｂｏｘ...
Plant biomass and biodiversity, element accumulation and return, water loss and
soil erosion, and changesin soil properties were studied for up to 10 years after conversion of
sparse tree-shrubby grass land into thefollowing four land use patterns: masson pine (Pznvs
massonzana Lamb.) land, beautiful sweetgum (Ltq-uidambar fomosana Hance) land, vegetation
reservation land, and artificial mowing land. The annualbiomass production of the masson pine
land was 5060 kg ha￣-1 being 4.9, 2.1, and 6.0 times that of the beau-tiful sweetgum land, the
vegetation reservation land, and the artificial mowing land, respectively. Comparedwith the
background values, the number of plant species for the vegetation reservation land increased
by 10species after 10 years of land utilization, while for the masson pine and the beautiful
sweetgum decreased by4, and for the artificial mowing land by 9. For masson pine land, total
amount of N, P, K, Ca, and Mg neededfor producing 1000 kg dry matter was only 3.5 kg, annual
element return through litter was 22 kg ha￣-1, bothof which were much lower than those of the
other patterns. Vegetation reservation was an effective measureto conserve soil and water and
improve soil fertility in the red soil hilly region. Artificial mowing arousedserious degradation of
vegetation and soil. Some measures and suggestions for management and exploitationof the
red soil hilly region such as masson pine planting, closing hills for afforestation, and
stereo-agricultureon one hill are proposed.
关键词
红壤丘陵区
土地利用类型
生态效应
ecological effects, land utilization, red soil
hilly region, soil change
