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本试验采用山毛豆、184柱花草和桂牧1号杂交象草在桉树林下间种,间种方式有两种:一是桉树株行距为3 m×2 m,行间间种牧草;二是桉树株行距为6 m×2 m,行间间种牧草,设不间种为对照。目的是筛选出适宜在桉树林下间种的牧草品种,拟解决桉树人工林生态环境问题。经二年试种、观察、测定结果,山毛豆、184柱花草和桂牧1号杂交象草在桉树株行距为3m×2m下间种的年均产鲜草分别为745.9 kg/亩、231.1 kg/亩和394.3 kg/亩;桉树株行距为6 m×2m下间种的年均产鲜草分别为1 495.0 kg/亩、1 134.5 kg/亩和1 080.2 kg/亩。山毛豆第二年产鲜草为最高,达2 500.4kg/亩。山毛豆、184柱花草和桂牧1号杂交象草的粗蛋白质含量分别为15.9%、11.1%和11.7%。试验结果表明,山毛豆的鲜草产量、粗蛋白质含量是三个牧草品种当中最高的,而且山毛豆牧草比较耐阴,易形成草层,桉树林下覆盖率高。
In this experiment, there were two species of intercropping under the eucalyptus forest with the hybrids of Siberian soybean, 184-column flower and Guimu-1 hybrid grass. There were two inter-species ways: first, the spacing of eucalyptus trees was 3 m × 2 m, Yes Eucalyptus plant spacing of 6 m × 2 m, inter-line grazing, set no species as a control. The purpose is to screen out the forage species suitable for planting under the eucalyptus forest and intend to solve the ecological environment problem of the eucalypt plantation. After two years of trial planting, observation and determination, the average annual yield of fresh grass of 745.9 kg / mu and 231.1 kg / mu and 394.3 kg / mu, respectively. The annual average yield of fresh grasses with intercropped eucalyptus trees of 6 m × 2 m was 1 495.0 kg / mu, 1 134.5 kg / mu and 1 080.2 kg / mu, respectively. Shanhaodian yield the second year fresh grass is the highest, up to 2 500.4kg / mu. The crude protein content of Shanzidou, 184-column flower and Gui-Mu-1 hybrid grass was 15.9%, 11.1% and 11.7%, respectively. The results showed that the fresh grass yield and crude protein content were the highest among the three forage species, and the forage was more tolerant to shade and easy to form grass layer. The coverage under eucalyptus forest was higher.