几种南方主要草坪杂草生物学特性及抗逆性

对在南方危害严重的5种草坪杂草的营养体繁殖能力、不同植株密度对草坪的侵蚀程度、植株对不同土层厚度的穿透力及其营养体抗逆性等作了试验观察。结果表明，空心莲子草的营养体繁殖力及抗逆性最强；地锦有性繁殖速度快和繁殖量大，但营养体抗逆性差。除地锦外，其余4种杂草对不同厚度的土层均有不同的穿透力。白茅和空心莲子草穿透力最强。提出了防控措施及颓废草坪的重建措施。

Biological characteristics of several lawn weeds in southern China and experimental observations on their stress tolerance

The reproductive ability, erosion degree of different lawn plants, soil penetration and stress tolerance of the vegetative parts were experimentally observed. The results indicated that Alternanthera philoxeroides had the strongest reproductive ability and stress tolerance. Euphorbia humifusa was the fastest in sexual reproduction, but weak in stress tolerance. Except for Euphorbia humifusa, the other four weeds had different penetration capability in the soil of different thickness. Imperata cylindrical and Alternanthera philoxeroides had the strongest penetration capabilities. Prevention, control and reconstruction measures on deserted lawns were brought forward.