| 摘要: |
| 将用磷酸二氢钾浸种处理的小麦和玉米种子,分别在30, 25和20℃及0. 0和-0. 5MPa环境水势条件下萌发,测定萌发率与生长量等指标。结果表明:①玉米浸种的适宜磷酸二氢钾浓度为0. 1mmol/L;②磷浸种使玉米和小麦的萌发时间提前;③磷浸种对种苗生长量的影响与不同作物及生长温度有密切关系,在高温下磷的作用明显;④不同浸种处理在萌发生长过程中,其吸胀—活化—生长阶段的划分有一定区别。 |
| 关键词: 种子处理，干旱胁迫，旱地农业 |
| DOI： |
| 分类号:S351.1;S351.51 |
| 基金项目:黄土高原土壤侵蚀与旱地农业国家重点实验室基金和杨凌科技开发基金资助项目 |
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| Effect of Seed Pretreatment with Phosphorus on Seed Germination and Seedling Growth |
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| Abstract: |
| Wheat and maize seeds were pretreated by soaking in passium dihydrophaphate solution for 24 hours, and germ inated under 30, 25 and 20℃, and 0. 0
and -0. 5MPa environmental temperature and water conditions respectively.The main
results obtained by measuring germination and seedling growth rate indicated (1)
KH2PO4 concentration formaize pretreatment was 0. 1 mmol/L; (2) seed pretreatment
with KH2PO4 could cause the seed germination period to occur earlier; (3) the effect of
phosphorus pretreatment to seedling growth rate varied depending on differentcrops and
temperature conditions, especially the significant effect occured under high temperature;
(4) the stage division of water-uptake, germination and growth differed during the germination and growth process with different seed pretreatment. |
| Key words: seed pretreatment,water stress, dryland farming |
