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菜豆性喜温暖,不耐霜冻,对光照时间要求不严格。主根发达,可深达60厘米以上,生有大量侧根,根系扩展半径可达30～80厘米,大部分根系分布在地表下15～20厘米处.菜豆较耐干旱,但过于干旱,植株生长不良且易落花落果,其采种技术如下。1 选择土质疏松,肥力中等,有灌溉条件的地块作采种田。菜豆最忌连作,在同一块地至少须隔2～3年,方可再种植。不同品种的菜豆应隔离50～100米。
Vegetable beans like warm, intolerant frost, the light of the time requirements are not strict. The main root developed, can be as deep as 60 cm, a large number of lateral roots, root extension radius of up to 30 to 80 cm, most of the roots distributed in the surface 15 to 20 cm. Kidney beans are more drought-resistant, but too dry, poor plant growth And easy to fall off the fruit, its mining technology is as follows. 1 Select loose soil, medium fertility, irrigation conditions for the acquisition of land plots. Beans avoid the most avoidable, in the same place at least every 2 to 3 years before planting. Different varieties of beans should be isolated 50 to 100 meters.