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对羊草割草地进行叶面喷施硼基微肥、复合晶Ⅱ号和复合晶Ⅲ号肥料的结果表明,三种复合肥料对羊草的Chl(a+b)含量、Chlb/a比率、叶面积及每株地上部干重均有影响,影响程度因施肥的种类、剂量、浓度及喷施次数而异。无论从叶面积的增加值还是从每株地上部干重增加值来看,均以复合晶Ⅲ号效果最好,并以采用12g/20m~2的剂量、用0.5％的浓度喷施2次或用0.7％的浓度喷施1次的方法为宜,可以明显提高羊草的叶绿素含量、叶面积和单株干物质产量。
The results showed that the contents of Chl (a + b), Chlb / a, the ratio of Chlb / a, Leaf area and shoot dry weight per plant have an impact, the extent of the impact of fertilization by the type, dose, concentration and spraying times vary. No matter from the added value of leaf area or from the shoot dry weight gain per plant point of view, all the best results of the composite crystal No. III, and to use the dose of 12g / 20m ~ 2, 0.5% concentration spray twice Or sprayed with 0.7% concentration for 1 time is appropriate, can significantly improve the chrysanthemum chlorophyll content, leaf area and dry matter yield per plant.