Epsilon Archive for Student Projects

Abstract

Eucalyptus spp. has got good properties in both pulp and timber production, and is very
suitable for plantations due to its fast growing abilities; which can be approved by adding
nutrients. The trees in a plantation are often strictly planted in rows with an un-used
spacing between the rows. This spacing could be utilized by using agroforestry and give
an increased socioeconomic welfare, more revenue, and a better ecological situation. The
purpose with this study is to investigate how fertilizers may affect Eucalyptus urophylla
(S.T Blake.), and if agroforestry practice is possible in E. urophylla plantations.
Biomass estimations were made through randomized plot samples, and nutrients analysis
through leave samples. The site and the area around were also evaluated on the basis of
agroforestry possibilities through interviews and literature.
The results showed high standing volumes in treatment NPK-150-B (81, 3 m3 ha-1) and
NPK-300-B (82, 4 m3 ha-1), and a high volume increment over the past year in treatment
NPK-100 (43, 6 m3 ha-1 yr-1). The best revenue in veneer was achieved in treatment NPK-
150-B (47 318 RMB/ha) and treatment NPK-300-B (46 665 RMB/ha), and the best
revenue in pulp was achieved in treatment NPK-150-B (35 123 RMB/ha) and treatment
NPK-300-B (34 305 RMB/ha) The agroforestry survey showed possibilities of
conducting agroforestry with Eucalyptus spp. and peanuts or cassava. The revenue in
roughly numbers were 7500 RMB/ha for cassava and 1275-1530 RMB for peanuts.
Nutrient analysis showed high Mn/N and Mg/N-ratios, and a decreased B/N-ratio
compared to the readings done last year. Almost every N-ratio level was higher than the
recommended value besides from the P/N-ratio which had a lower value.
The recommended nutrient compound should be between NPK-100 and NPK-100-B
Agroforestry can be cooperated into E. urophylla plantations. Preferably using cassava or
peanuts as intercrop species: depending on the commodity interest of the user.