摘要
结合地膜、保水剂和滴灌系统,研究其在不同土壤基质势下对马铃薯生长及水分利用的影响。结果发现:土壤20 cm处不同土壤基质势下,露地未施保水剂处理有较好的生长势和较高产量,地膜覆盖并施用保水剂处理能提高大中薯率、商品薯率和灌溉水利用率;土壤基质势在-20 kPa及-25 kPa下,马铃薯生长势、产量及块茎商品性差异不大,但较低的土壤基质势会削弱保水剂的保水性能。试验结果表明:晚播春马铃薯不适宜在整个生育期内覆盖地膜,采用保水剂与滴灌系统相结合可以达到节水增产的目的。
Potato （Solanum tuberosum L. ） is an important food crop in the north of China, and it is very sensitive to water stress. Combination of plastic film, superabsorbent polymer （SAP） and drip irrigation system was made to study growth and water use of potato under different soil matric potential （SMP）. The results presented that the treatments without mulching and SAP under different SMP at 20 cm soil depth had much higher rate of big-middle size tuber, commercial tuber and IWUE; there were little significance on growth, yield and commercial attribute between the treatments with mulching film under different SMP, but lower SMP may weaken the capability of water-saving of SAP. This research presents planting potato with plastic film mulching should move up a date, and planting potato with SAP and drip irrigation is a good way to saving water and increasing yield.
出处
《干旱地区农业研究》
CSCD
北大核心
2010年第1期54-60,共7页
Agricultural Research in the Arid Areas
基金
"十一五"国家科技支撑计划"农田地表覆盖保护关键技术研究"(2006BAD15B02)
