窑窖集水节灌地膜栽培辣椒研究初探

Rainwatercollection in water kiln and water savingirrigation for filmmulched pepper

在北方干旱区，集水节灌栽培地膜辣椒具有明显的经济效益，并能显著提高水分利用率。试验结果表明，在辣椒根系生长范围内，分别以田间最大持水量的４０％、６０％和８０％做为整个生长期的补充水量，产量和产值并未随补充水量的增加而同幅度提高，要使产量大幅度提高，补充水量必须在根系生长范围内田间最大持水量的６０％以上。同时研究了非充分补灌条件下不同灌溉部位的产量结果及根系生长的结果表明，人为控制局部交替补灌有促进根系纵向延伸的作用，并显著增加产量。辣椒的补充水分关键时期在初花后１０ｄ开始的生殖生长集中期内。

Rain collection and saving irrigation for filmmulched pepper in dryland of north China has significant effect in economy and raises the water use efficiency greatly. The results show that when 40%,60% and 80% of the water field capacity in root systems deep range (about 40 cm deep soil) is taken as the amount of water supply the period of growth, the economic yield and benefit isnt increased at the same rate. In order to increase the product at a great rate, the amount of water supply must be over 60%. The result of different irrigation parts to root growth under the nonfull irrigation shows that controlled partial altenative irrigation promotes the vertical growth of filmmulched pepper root, and significantly improves pepper product. The key irrigation period of pepper is the major stage of reproduction 10 days after flowering.