洋葱在产籽时期的耐盐性

在用ＮａＣｌ、Ｎａ２Ｓｏ４、ＮｇＭ１２和ＭｇＳＯ４人工盐化了的花盆里研究了洋葱产籽时期的耐盐性。当土壤含盐量值分别超过４．０ｄＳｍ－１和６．０ｄＳｍ－１时，洋葱鳞茎的发芽率和营养生长下降。土壤含盐量（ＥＣｅ）每提高１单位（ｄＳｍ－１），洋葱种子产量则以６％的速率降低。在含盐量为８．１０ｄＳｍ－１时，洋葱种子产量与一个未盐化的对照比减少５０％。在盐渍状态下，种子千粒重仍不受影响。含盐量对种子发芽无不良作用。

Studies on the Super-high-yield Cultivation Techniques for Oats in Tibet

[Objective] The aim was to explore the optimal levels of different factors influencing oat yield in Lhasa, Tibet. [Method] Orthogonal test was conducted to analyze oat cultivation technology in Tibet. [Result] Qingyin No.2 and Baiyan No. 8 were proved the optimal species to be grown in Lhasa with optimal sowing quantity at 150-180 kg/hm2. Sowing term is an extremely significant factor affecting growing season, and species and N fertilizer are significant factors. Al factors have none significant effects on hay yield. [Conclusion] The research provides theoretical refer-ences and technological supports for large-scale planting.