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莴苣质脆鲜嫩,味美可口,是人们喜爱的一种蔬菜,同时对解决蔬菜春淡问题和增加蔬菜花色品种也都有一定的作用。但在留种上还存一些问题,在很大程度上影响莴苣生产的发展。为此,特按照我们的改进意见,谈谈莴苣留种技术。 一、春莴苣留种 莴苣春季留种最辣手的是病害问题。春季雨水多,后期气温又逐渐升高,莴苣极易发生霜霉病和菌核病,防治不好就会造成种子减产,甚至颗粒无收。我们对留种技术的改进意见,主要是迟播种、晚定植、密栽培和控追肥。
Lettuce crisp and tender, delicious and delicious, is a favorite vegetable, at the same time to solve the problem of vegetable spring and summer and increase vegetable varieties also have a role. However, there are still some problems remaining in the species that largely affect the development of lettuce production. To this end, especially in accordance with our suggestions for improvement, let’s talk about technology to stay lettuce. First, the spring lettuce to stay lettuce Spring leaves the hottest is the disease problem. Spring rain and more late temperature gradually increased, lettuce susceptible to downy mildew and sclerotinia, prevent poor will result in reduced production of seeds, and even crop failure. Our suggestions for improvement of the technology for seed retention are mainly late sowing, late sowing, close planting and top dressing.