摘要
以多年生黑麦草和白三叶草组成的人工草地在1981年投产后,连续几年分区轮施了钙镁磷肥,使牧草在初期的五六年时间内保持旺盛的长势。在原有施肥水平上,近二年牧草长势却有衰落趋势,对草地施肥的营养元素不平衡可能是重要原因之一。因此,在湖南省城步县南山牧场人工草地上进行了微量元素肥料喷施试验。结果表明:目前该草地需要补充钼、锌、硼,不需要锰和铜。施石灰的效应是间接的,它可以提高钼的利用率,但却产生诱发性缺锌。直接施肥比施石灰容易得多,因此不用石灰。
It had been supposed that unbalanced mineral nutrition was a possible causal factor for the declination of the artificial pastures(rye grass+white clover)on Nanshan cattle farm, Chengbu county, Hunan province. A trial of trace—element application on the farm shown that the pasture was in need of Mo, Zn and B. Lime applied to the soil would improve the efficiency of Mo but reduce the efficiency of Zn at the same time. So it was suggested that lime should not be used in the procedure of applying the trace element fertilizers.
出处
《草业科学》
CAS
CSCD
北大核心
1990年第2期65-67,共3页
Pratacultural Science
