中文摘要：

探讨不同氮肥滴灌施肥方式对盐渍土壤上棉花生长和氮素吸收的影响,对于膜下滴灌条件下盐渍土的合理利用和水肥管理有重要意义。在膜下滴灌条件下,进行了不同氮肥滴灌施肥方式和土壤盐度对棉花生长和氮素吸收影响的田间试验。试验结果表明：氮肥滴灌施肥方式和土壤盐度显著影响棉花的生物量和产量。氮肥在一次灌溉的前期施用的施肥方式可显著促进棉花生长,尤其可以显著提高结铃数,从而增加棉花的生物量和籽棉产量。棉花的氮素吸收受土壤盐度、施肥方式以及二者交互作用的影响显著。在土壤盐度较低条件下,氮肥在一次灌溉的前期施用的施肥方式可显著提高棉花的氮素吸收总量;而盐度较高时,氮肥在一次灌溉的中间施用的施肥方式则有助于促进棉花的氮素吸收。

英文摘要：

It is of great importance to study the growth and nitrogen （N） uptaking by cotton for optimizing soil salinity, irrigatiou and fertilization strategies with drip irrigation under film. The yield and N uptaking by cotton were investigated in a field experiment with different fertigation schemes of N fertilizer and soil salinity levels. Cotton aboveground dry biomass and yield were significantly affected by fertigation scheme and soil salinity. The fertigation scheme that nitrogen applied in the beginning of the irrigation cycle increased dry matter accumulation and seed yield. N uptaking was significantly influenced by salinity, fefitigation scheme and N × fertigation scheme interaction. At low salinities, the highest of N uptaking was found in the fertigation scheme that nitrogen applied in the beginning of the irrigation cycle. At higher salinities, the fertigation scheme that nitrogen applied at the end of the irrigation cycle increased the N uptaking.