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中国农学通报 ›› 2016, Vol. 32 ›› Issue (9): 15-19.doi: 10.11924/j.issn.1000-6850.casb15090119

• 农学 农业基础科学 • 上一篇    下一篇

不同肥料处理对Ⅱ优725茎秆物理性状的影响

范永义,杨国涛,赵祥,范存留,韦叶娜,敬银钦,罗红梅,胡运高   

  1. 西南科技大学水稻研究所,西南科技大学水稻研究所,西南科技大学水稻研究所,西南科技大学水稻研究所,西南科技大学水稻研究所,西南科技大学水稻研究所,西南科技大学水稻研究所,西南科技大学水稻研究所
  • 收稿日期:2015-09-26 修回日期:2015-11-06 接受日期:2015-12-23 出版日期:2016-03-29 发布日期:2016-03-29
  • 通讯作者: 胡运高
  • 基金资助:
    国家科技支持计划“长江上游优质抗病种质创制与新品种选育”(2014BAD01B03);国家科技支持计划“水稻新品种培育与扩繁”(2011BAD35B02);国家政策引导类科技计划及其他专项“抗病转基因水稻新品种培育”(2013ZX08001-002);四川省岗位专家项目“氮高效种质创新研究”(川农业函[2014]91 号);杂交水稻国家重点实验室开放基金项目“水稻耐镉的基因型差异机理研究与镉安全亲本水稻材料的筛选”(2014KF01)。

Stalk Physical Properties of Hybrid Rice‘Ⅱ You 725’Under Different Fertilizer Treatments

  • Received:2015-09-26 Revised:2015-11-06 Accepted:2015-12-23 Online:2016-03-29 Published:2016-03-29

摘要: 旨在比较研究不同浓度钾肥或硅肥对其植株抗倒伏性的影响,以‘Ⅱ优725’为试验材料,采用完全随机设计。本研究中钾肥施用浓度为75 kg/hm2时效果最好,N2、N3、N4 节间抗折力较对照分别增加4.95%、24.15%、35.46%,但倒伏指数反而较对照分别降低0.86%、14.22%、32.06%;硅肥的最佳施用浓度为240 kg/hm2,在抗折力分别增加5.57%、20.29%、17.73%的情况下,其倒伏指数反而分别降低0.06%、18.21%、29.20%。适宜浓度的钾肥或硅肥能在一定程度上提高植株的抗倒伏能力,它们主要是提高基 部高节位节间(N3、N4)的抗折力,从而降低倒伏指数。因此,施用钾肥或硅肥能显著增加穗重和植株的抗倒伏性。

关键词: 土地利用结构, 土地利用结构, 洛伦兹曲线, 基尼系数, 西峰区

Abstract: Rice lodging resistance is affected by different concentrations of potash and silicon fertilizer. In this study, the authors used‘ ⅡYou 725’as the material and adopted a completely random design. The best concentration of potash fertilizer was 75 kg/hm2, under which the internode breaking resistance of N2, N3 and N4 increased by 4.95%, 24.15% and 35.46%, respectively, in comparing with that of control, however, the lodging index decreased by 0.86%, 14.22% and 32.06%, respectively. Further more, the best concentration of silicon fertilizer was 240 kg/hm2, the lodging index decreased by 0.06%, 18.21% and 29.20%, respectively, and the breaking resistance simultaneously increased by 5.57% , 20.29% and 17.73% , respectively. Appropriate concentration of potash or silicon fertilizer could improve the lodging resistance of rice plants, they mainly improved the breaking resistance of basal high position internodes to reduce the lodging index. As a result, application of potash or silicon fertilizer could significantly increase the grain weight and lodging resistance of rice plant.

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