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按照一定的顺序播下十五个白三叶品种,用其评价新品种和有潜力的品种的种籽生产能力,并探索那些影响种籽产量的生长因素。其主要方法是,计算出每平方米面积上的花序数、成熟花序和其它花序所占的比例及结籽特性,用这些数据来评价种籽生产的潜力。第一年和第二年可能达到的种籽产量平均分别为276公斤/公顷和76公斤/公顷。第二年种籽产量的大幅度下降,突出地说明当年七、八月期间恶劣的气候条件对它们的影响。受到影响较大的,则是三叶草花序总数的减少、每束花序小花的减少以及每朵小花结籽数的减少。一些新注册的品种,显然具有比S100高的种籽生产潜力,如Menna高38％,Olwen高28％。这将促进不列颠培育的品种的种籽生产,保证有充足的种籽供应。
Fifteen white clover cultivars were sown in the order they were used to evaluate the seed production capacity of new varieties and potential varieties and to explore those growth factors that affect seed yield. The main method is to calculate the number of inflorescences per square meter, the proportion of mature inflorescences and other inflorescences, and the seed-setting characteristics. These data are used to evaluate the potential of seed production. The average seed production in the first year and the second year could reach 276 kg / ha and 76 kg / ha, respectively. The sharp drop in the second year’s seed production underscores the impact of the harsh climatic conditions during July and August of that year. The more affected are the reduction of the total number of clover inflorescences, the reduction of inflorescences per inflorescence, and the reduction of the number of seeds per flower. Some of the newly registered varieties apparently have higher seed production potential than the S100, such as 38% for Menna and 28% for Olwen. This will promote the seed production of breeds cultivated in Britain and ensure adequate supply of seeds.