Artificial propagation by seeding useful wild grasses.

由于商品牧草种子入侵物种的问题，利用乡土牧草作为饲料作物或恢复植被是非常重要的。逸出的牧草入侵了各种生态系统，对生物多样性产生了负面影响。于是，许多生态学家建议将原生牧草用于人工草地。但是，利用乡土牧草也存在着种子采集困难等问题。日本乡土牧草种子较小，有乳突，采集难度较大。我们不能用普通的种子收割机收割乡土牧草。而且，由于在一个群体中存在较多的遗传变异，很难将所有的乡土牧草种子调整到人工条件下。因此，我们试图寻找足够的品种来重建植被。此外，我们还尝试开发了乡土牧草种子收割机，有些品种种子大，种子不休眠。人们认为这些品种对植被重建非常有用。我们通过对手提式排种器进行挖掘机改造，开发出了种子收割机。与人工采种相比，该采种机的采种效率很高。这些结果对利用乡土牧草进行种子繁育具有重要意义。

It is very important to use native grass for fodder crop or re-vegetation because of problems of invading species of commercial based seeds of pasture grass. Escaped pasture grass had been invaded to various ecosystems and they negatively changed bio-diversity. Then, many ecologists recommend to use the native grass for artificial grassland. But, there are some problems for using native grass such as difficulty of seed collection. Seed collection of Japanese native grass is very difficult because of small seed with pappus. We can not use common seed harvester for native grass. And, it is very difficult to adjust the all seed of native grass to artificial condition because there are many genetic variations in only one population. So, we tried to search adequate varieties for re-vegetation. And,we tried to exploit seed harvester for native grass.There are some varieties having large seed with no seed dormancy. It is thought that these varieties are very useful for re-vegetation. We exploited the seed harvester by miner change of handy engine duster. The efficiency of seed collection is very high of this seed harvester compare to hand collection. These results is very important for using native grass by seed propagation.