河北二季作区春马铃薯-夏秋大葱高产高效栽培技术

在河北二季作区早春种植马铃薯，同时进行大葱育苗，马铃著收获后定植一茬大葱，每667m2纯效益可达5500～8600元。其中6月中旬马铃著产量2500--4000kg，纯效益2500--．4600元，大葱每667m2一般产5000kg左右，每667m2纯收入3000--4000元，获得了较高的经济效益。马铃薯可以在淡季供应上市，大葱可以补充秋冬季蔬菜淡季供应，取得了较好的社会效益。

High Yield and High Benefit Culture Techniques for Spring Potato-Summer and Autumn Leek in the Two Cropping System of the Hebei

In the two cropping system of Hebei, potatoes are planted in early spring, and at the same time the seeds of leek are planted in a nursery for seedling production. After harvest of potato, leek seedlings are transplanted into the field of potatoes. In this system, the net income is 5 500 - 8 600 yuan / 667 m2, of which 2 500 - 4 600 yuan / 667 m2 are from the yield （2 500 - 4 000 kg / 667 m2） of potatoes harvested in mid-June, and 3 000 - 4 000 yuan / 667 m2 from the yield （about 5 000 kg / 667 m2） of leeks, producing good economic returns. Potatoes can be marketed in off season, and leeks can be provided to the market in the late autumn and early winter seasons. So the social benefit is also good.