我国有野生植物约三万多种,已发现可供利用的有二千五百多种,其中有纤维、油脂、香料、糖味、药品等。这都是有较高经济价值的资源。我们所要谈的野生绿肥植物,大部分还没有引起人们的足够重视,只能自生自灭或在广阔的原野、山川被草食动物自由取食。长此下去,一些有价值的草种也会频于灭绝。有人估计,今后五十年内,高等植物的灭绝,可能多达二万五千多种。 There are more than 30,000 species of wild plants in our country. We have found that there are more than 2,500 species available for use, among which are fibers, oils, spices, sugar flavors and medicines. This is a resource with high economic value. Most of the wild green manure plants that we are talking about have not given enough attention to people and can only be fed freely by herbivores in the vast fields and mountains and rivers. If things go on like this, some valuable species of grass will often be extinct. Some estimate that the extinction of higher plants in the next 50 years may amount to more than 25,000.