Publication Date

1989

Description

Yunnan Province in south west China is very mountainous and has several major climatic/ecological zones ranging from tropical to alpine but all are dominated by the south Asian monsoonal rainy season. Extensive tracts of hilly depleted range lands occur in the mid-altitude zone (1800-2500 m) that are potentially suitable for developing to improved legume based pastures. Results of investigations as to suitable species and appropriate fertilizers for this purpose have been discussed previously (Mathison et al., 1985 and Wang et al., 1985). The Project has succesfully established model farms at several places throughout the Province and these carry reasonably pro­ductive pastures which are being control grazed under improved stock management systems. It is desirable to obtain information as to the long term maintenance fertilizer requirements of these newly developed (since 1983 on) pastures. A special series of fertilizer trials have been laid down for this purpose that are of simple design and located in farm paddocks under grazing. The objective of this paper is to pre­sent preliminary rate of growth curves from two mid-altitude sites.

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Preliminary Rate of Growth Curves for Legume Based Improved Pastures in the Mid-Altitude Region of Yunnan Province of Southern China

Yunnan Province in south west China is very mountainous and has several major climatic/ecological zones ranging from tropical to alpine but all are dominated by the south Asian monsoonal rainy season. Extensive tracts of hilly depleted range lands occur in the mid-altitude zone (1800-2500 m) that are potentially suitable for developing to improved legume based pastures. Results of investigations as to suitable species and appropriate fertilizers for this purpose have been discussed previously (Mathison et al., 1985 and Wang et al., 1985). The Project has succesfully established model farms at several places throughout the Province and these carry reasonably pro­ductive pastures which are being control grazed under improved stock management systems. It is desirable to obtain information as to the long term maintenance fertilizer requirements of these newly developed (since 1983 on) pastures. A special series of fertilizer trials have been laid down for this purpose that are of simple design and located in farm paddocks under grazing. The objective of this paper is to pre­sent preliminary rate of growth curves from two mid-altitude sites.