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葱头收获期在六月底至七月初,产品耐贮藏,供应期长,对调节八九月淡季供应起着很大的作用。葱头在海淀区多是秋播春栽,亩产量一般在四、五千斤左右。为了进一步提高葱头的产量,在本区推广春播露地蔬菜地膜覆盖的基础上学习外地经验,在今春栽植葱头的季节,我们开展了地膜覆盖葱头的试验。全区共有试验点十个,试验地盖膜面积五十二亩(不包括对照)。在六月底进行了实地测产,所有试验地块,盖膜的葱头均比不盖膜的葱头产量高,一般亩产达到8000斤以上,而对照田大部分在四、五千斤左右。海淀公社万泉庄大队第三生产队有葱头试验地六亩,其中五亩盖了地膜,选五点采样测产结果,平均亩产鲜葱头(注)9367.3斤,比对照6368斤增产47%。四季青公社曙光二队6亩盖膜葱头亩产达到8081.5斤,盖膜葱头普遍表现个头大、个头匀、表皮光滑干净,提高了商品质量。
Onion harvest in late June to early July, the product shelf life, long supply period, regulating the off-season in August and September supply plays a big role. Onion in Haidian District is mostly autumn sowing, mu yield is generally about four or five pounds. In order to further increase the production of onions, based on the study of plastic film mulching in spring in this area, we learned from the field experience that in the season of planting spring onion in spring, we carried out the experiment of mulching onions. A total of ten pilot sites in the region, the test cover area of 52 mu (not including the control). Field test was conducted at the end of June. All the plots on the plot had higher onion production than the non-membrane onions. The average yield per mu reached more than 8,000 kg, while that of the control plot was mostly about 4 to 5 kg. The third production team of Haidian commune Wanquanzhuang Brigade had six acres of green onions, of which five acres covered the plastic film and selected five-point sampling and yielding results. The average yield of fresh onion (Note) 9367.3 jin, 6368 jin than the control, an increase of 47% . Sijiqing commune Dawn two teams 6 mu mulching film onion yield of 8081.5 kg, covering the general performance onions big heads, evenly, the skin smooth and clean, improve the quality of goods.