论文部分内容阅读
在早春蔬菜育苗过程中,常常因天气及管理不当等因素,会出现异常的生长情况。若不采取相应的措施加以防治,将会影响蔬菜苗的定植,从而影响蔬菜生产。 (1)沤根:沤根主要表现为蔬菜苗根部发黄枯萎,叶片深绿不宜舒展,部分叶边缘或全部枯黄。这主要是因温度过低(10℃以下)土壤湿度过大造成的。其防治措施是:设法提高地温,延长生长时间。有条件者可用电热温床育苗法,在阴天、大风天的低温天气里,通过延长通电时间提高地温。 (2)高脚苗:主要因播种量过大,出苗后温度太高造成的。防治措施:早匀苗,齐苗后控制好温度,如辣椒苗白天以20～25℃,夜间以15℃为宜;番茄苗白天以15～20℃,夜间以5～10℃即可;黄瓜苗白天以22～25℃,夜间以14℃左右为宜。一旦发现蔬菜
In early spring vegetable nursery process, often due to improper weather and management and other factors, there will be abnormal growth. If you do not take the appropriate measures to prevent and control, will affect the planting of vegetable seedlings, thus affecting the vegetable production. (1) 沤 root: 沤 root is mainly manifested as yellow seedling root blight, dark green leaves should not stretch, part of the edge of the leaves or all yellow. This is mainly due to the temperature is too low (below 10 ℃) caused by excessive soil moisture. The prevention and treatment measures are: try to improve the ground temperature, prolong the growth time. Conditions can be used electric hotbed nursery law, in the cloudy, windy days of cold weather, by increasing the power to increase the ground temperature. (2) high seedlings: mainly due to seeding is too large, caused by the temperature is too high after emergence. Control measures: early uniform seedlings, Qi Miao control the temperature, such as pepper seedlings during the day to 20 ~ 25 ℃, night to 15 ℃ appropriate; tomato seedlings during the day to 15 ~ 20 ℃, night to 5 ~ 10 ℃ can; cucumber Miao day to 22 ~ 25 ℃, night to 14 ℃ is appropriate. Once found vegetables