Scientia Silvae Sinicae ›› 1999, Vol. 35 ›› Issue (zk): 34-40.
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Chengbiao Huang,Hongwen Liang
Online:
Published:
Abstract:
From 1991 to 1996, the monitoring method of fixed position of runoff plots was used to study the loss amounts of soil, water and its nutrinet of Pinus massoniana Lamb engineering young plantation with different site preparation in Guiping city, Guang xi.The results showed that :Mean amounts of water runoff of Pinus massoniana young plantation with overall preparation, strip preparation and hole preparation was 1348.50 t/hm2·a, 1138.39 t/hm2·a and 1094.91 t/hm2·a respectively.Mean amounts of soil loss with overall preparation, strip prepration and hole preparation was 9.31 t/hm2·a, 4.090 t/hm2·a and 1.917 t/hm2·a respectively. Mean amounts of nutrient loss from soil and water of overall preparation strip, strip preparation and hole preparation was 166.17 kg/hm2·a, 76.27 kg/hm2·a and 39.8 kg/hm2·a respectively, that was 825.1 %, 378.7 % and 197.7 % of shrub and herbaceous respectively.Comparing with before plantation there was a decreasing trend in nutrient content of soil(organic matter, total N, hydrolytic N, and rapidly available K)in the 6-year-old Pinus massoniana young plantation planted with different preparation way s.The total frequecy of decline was 20.4 %, 10.6 %, 5.3 %for overall preparation, strip preparation and hole preparation respectively.The results showed that Pinus massoniana engineering young plantation with hole preparation(40cm ×40cm ×30 cm)has obvious soil and water conservation effects.It is proposed to popularize and apply such site preparation before planting in south area of China.
Key words: Pinus massoniana Lamb, Engineering young plantation, Site preparation way, Soil and water conservation effect
Chengbiao Huang,Hongwen Liang. STUDIES ON SOIL AND WATER CONSERVATION EFFECTS OF DIFFERENT SITE PREPARATION OF PINUS MASSONIANA ENGINEERING YOUNG PLANTATION[J]. Scientia Silvae Sinicae, 1999, 35(zk): 34-40.
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Table 1
Physical properties and moisture content in soils of monitored plot before planting"
Table 2
The basic situation of the runoff plots"
Table 3
The amount of water loss over years from plots prepared in different ways"
Fig.1
Monthly change in the water runoff amounts and precipitation"
Table 4
Over years the soil loss amounts from different preparation and plantig plots"
Table 5
Multiple comparison of the annual soil loss amounts from different preparation and planting plots"
Fig.2
Monthly change in the soil loss amounts and precipitation"
Table 6
Amount of nutrients loss in runoff in different preparation and planting plats."
Table 7
Soil nutrient loss amount in different preparation and planting plots"
Table 8
Change in nutrient contents of soil in different preparation and planting plots before and after plantation"
