摘要
运用ｄｅＷｉｔ（１９６０）的植物竞争试验方法对鸭茅和黑麦草在不同管理条件下的竞争特性进行研究。结果表明，环境条件对两种牧草的竞争关系具有明显影响，在施肥条件下，混播草地中黑麦草的种间竞争力明显较高，鸭茅的生长和生产在一定程度上受黑麦草的竞争抑制；而在不施肥时，黑麦草对鸭茅的种间竞争力明显减弱，鸭茅对黑麦草的竞争影响程度有增加的趋势。同时，随刈割频率的增加，两种牧草的种间竞争强度相对降低。因此建议，在土壤肥力较差时，可通过施肥等措施加强黑麦草的竞争力，但当鸭茅的生长情况较差时，施肥并不一定能有效改变鸭茅竞争劣势的状况。同时适时刈割是减少牧草间竞争强度的有效方法。
The competition characteristics between orchardgrass and ryegrass under different management regimes were studied by an experiment using the method of de Wit (1960). It was shown that the management conditions had a notable influence on the competition between the two species. Under fertilisation, the competition power of ryegrass was significantly higher than that of orchardgrass in a mix of them, and hence the growth and yield of the latter were suppressed to some extent by the former. Without fertilizer application, however, the competition power of ryegrass would be weakened, so that orchardgrass tended to be a stronger competitor. The intensity of competition between the two species in a mix was lowered with an increase in frequency of cutting. It was concluded, therefore, that fertilisation can be used to strengthen the growth of ryegrass in a mix with orchardgrass on soils of low fertility, but this method cannot be applied to improve the inferior situation of orchardgrass in an existing mix. Increasing the frequency of cutting would be an effective way for maintaining the proportions of the two species in a mix.
出处
《草业学报》
CSCD
1997年第3期23-31,共9页
Acta Prataculturae Sinica
关键词
鸭茅
黑麦草
竞争
肥力
刈割
人工草地
Orchardgrass, ryegrass, competition, fertility, cutting
