西宁地区露地白菜茬口对倒茬作物化感效应

Allelopathic Effects of Chinese Cabbage on After Crops in the Open Field of Xining Area

为在西宁地区进一步推广蔬菜一年两熟制种植,采用白菜自然风干后的植株水浸提液对不同倒茬植物(大葱、西葫芦、萝卜、花椰菜、白菜和甘蓝)种子萌发和幼苗生长的化感效应进行研究。结果表明:白菜水浸提液对6种作物种子萌发有明显的抑制作用,综合敏感指数从强到弱依次为:甘蓝(-2.47)、花椰菜(-2.47)>白菜(-2.44)>萝卜(-2.38)>大葱(^(-1).24)>西葫芦(-0.85)。白菜对于后茬作物具有较强的化感作用,应根据需要适当选择适宜轮作品种。

In order to promote the one year two crops in Xining area,the Chinese cabbage were naturally dried and taking its plant exacts to soak the seeds of green onions,summer squash,zucchini,radish,Chinese cauliflower,cabbage and cabbage to research the allelopathic effects of Chinese cabbage on after crops.The results showed that the extracts of Chinese cabbage was obviously inhibited the germination of tested seeds and the sensitive index from strong to weak were as followed,cabbage(-2.47),cauliflower(-2.47)>Chinese cabbage(-2.44)>radish(-2.38)>green onion(-1.24)>Chinese(-0.85).In conclusion,Chinese cabbage had strong allelopathic effects on its after crops,we should choose the suitable rotation crops.