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不同施磷水平对玉米抗旱特性及
产量的影响
目 录
1 ·····························································1
2 文献综述···································································2
2.1 干旱胁迫对玉米的影响··················································· 2
2.1.1干旱胁迫对玉米苗期及拔节期的影响·································· 3
2.1.2干旱胁迫对玉米抽雄吐丝期及灌浆期的影响···························· 3
2.2 施磷对玉米的影响······················································· 4
2.3 施磷对作物抗旱特性的影响··············································· 5
2.3.1 施磷对作物保水能力及水分利用效率的影响··························· 5
2.3.2 施磷对干旱胁迫下作物光合生理的影响······························· 5
2.3.3 施磷对干旱胁迫下作物渗透调节物质及抗氧化酶活性的影响············· 6
2.3.4 施磷对干旱胁迫下作物形态指标的影响······························· 6
2.3.5 水磷耦合对作物及其产量的影响····································· 7
2.4 负水头灌溉系统的使用及发展············································· 8
3 研究内容·································································· 8
4 技术路线·································································· 9
5 试验材料与方法···························································· 9
5.1 供试材料······························································· 9
5.2 负水头灌溉系统原理····················································· 9
5.3 实验设计······························································ 10
5.4 调查测定项目及方法···················································· 11
5.4.1 水分利用效率····················································· 11
5.4.2 磷素利用效率····················································· 11
5.4.3 形态指标测定····················································· 11
5.4.4 生理生化指标测定················································· 12
5.4.4.1 渗透调节物质及丙二醛含量测定······························ 12
5.4.4.2 抗氧化酶活性测定·········································· 12
5.4.4.3 叶绿素含量测定············································ 12
5.4.4.4 光合指标测定·············································· 12
5.4.5 动态生理指标测定················································· 12
5.4.5.1 土壤
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