Assessment of methods of re-seeding subterranean clover near Esperance, Western Australia
Assessment of methods of re-seeding subterranean clover near Esperance, Western Australia
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西澳大利亚州埃斯佩兰斯附近重新播种地下三叶草的方法评估
DOI：
10.1071/ea9850886
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发表时间：
1985
影响因子：
--
通讯作者：
M. Bolland
中科院分区：
文献类型：
--
作者：
M. Bolland
1979年和1980年，在西澳大利亚州埃斯佩兰斯附近调查了三种重新播种地下三叶草的方法：在季节休息前播种（干播），以及在季节休息后播种，通过机械耕作或除草剂杀死新出现的牧场。在冬季生长季节开始前将地下三叶草播种到谷物残茬中，然后在出苗后连续放牧，以防止三叶草幼苗被覆盖，是最经济的方法。它不涉及与其他方法（翻耕和松土，或除草剂和喷洒）相关的成本，它在冬季生产的干牧草是其他方法生产的5倍到20倍，并且在冬季有两倍的绵羊承载能力。三叶草种子产量的差异在三种方法之间没有统计学意义，但产量减少了约30%，当放牧的谷物残茬干播种处理推迟到6周后出现的幼苗，因为一个30%的三叶草幼苗的数量减少。
In 1979 and 1980, three methods of re-seeding subterranean clover were investigated near Esperance, Western Australia: seeding just before the break to the season (dry-seeding), and seeding after the break, after killing the emerging pasture by mechanical cultivations or with herbicides. Sowing subterranean clover into a cereal stubble just prior to the break of the winter growing season, followed by continuous grazing after emergence to pr, vent overtopping of the clover seedlings, was he most economical method. It did not involve costs associated with the other methods (ploughing and scarifying, or herbicides and spraying), it produced between five and twenty times as much dried herbage in winter as was produced by the other methods, and had twice the sheep-carrying capacity in winter. The differences in clover seed yields between the three methods were not statistically significant, but yields were reduced by about 30% when grazing of dry-seeded treatments in cereal stubble was delayed until 6 weeks after emergence of seedlings, because of a 30% decrease in the number of clover seedlings.