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中国农学通报

中国农学通报 ›› 2016, Vol. 32 ›› Issue (24): 36-42.doi: 10.11924/j.issn.1000-6850.casb16050037

所属专题： 水稻

• 农学 农业基础科学 • 上一篇    下一篇

晒田土壤含水量对水稻有效分蘖的影响

杨 军1,黄淑娥1,张金恩1,张崇华2,王尚明2   

  1. (1江西省气象局/江西省气象科学研究所,南昌 330096；2江西省农业气象试验站,南昌 330200）
  • 收稿日期:2016-05-08 修回日期:2016-05-23 接受日期:2016-05-24 出版日期:2016-08-29 发布日期:2016-08-29
  • 通讯作者: 黄淑娥
  • 基金资助:
    国家公益性行业（气象）科研专项“气候变化背景下双季稻生产全过程的气象适用技术研究”(GYHY201406025)；江西省气象局青年人才培养项目“中稻花期高温热害的指标研究”。

Effects of Soil Water Content After Field Drying on Rice Effective Tillers

Yang Jun1, Huang Shue1, Zhang Jinen1, Zhang Chonghua2, Wang Shangming2   

  1. (1Jiangxi Institute of Meteorological Science, Jiangxi Meteorological Bureau, Nanchang 330096; 2Agro-meteorological Experiment Station of Jiangxi Province, Nanchang 330200)
  • Received:2016-05-08 Revised:2016-05-23 Accepted:2016-05-24 Online:2016-08-29 Published:2016-08-29

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摘要： 为探究水稻有效分蘖与土壤含水量的关系，以杂交早稻‘淦鑫203’和晚稻‘五丰优T025’为材料分早晚季进行试验，以不晒田为对照，设计4个晒田处理（分蘖数达预计成穗数的70%连续晒田5天及10天、80%成穗数晒田5天及10天，分别记为W1、W2、W3和W4），采用土壤水分自动记录仪监测土壤5、10、20 cm深的体积含水量，研究不同晒田处理条件下土壤含水量对水稻分蘖成穗的影响。结果表明：早稻分蘖末期W1、W3和W4晒田处理及晚稻W2和W3处理均能控制无效分蘖，提高成穗率。早稻晒田处理效果排序为：W4＞ W1＞ W3＞ CK＞ W2，晚稻为W2＞ W3＞ W1＞ CK＞ W4。单株有效分蘖数和成穗率与5、10、20 cm土壤体积含水量的关系可用二次曲线拟合；早、晚稻分蘖末期排水晒田至0~20 cm土壤体积含水量为47%~55%时，有效分蘖数和成穗率较高。

关键词: 茶叶加工, 茶叶加工, 干燥原理, 单一干燥, 联合干燥, 在线检测

Abstract: In order to investigate the relationship between effective tillers of rice and soil water content, experiments were carried out with early rice ‘Ganxin 203’ and late rice ‘Wufengyou T025’, the treatment without field drying was used as CK, four field drying treatments were conducted, which were field drying for 5 days (W1) and 10 days (W1) when tillers came to 70% expected panicles, field drying for 5 days (W3) and 10 days (W4) when tillers came to 80% expected panicles, soil volumetric water content in 5, 10 and 20 cm depth was monitored by soil moisture recorder, the effect of soil water content under different field drying treatments was investigated. The results showed that treatment W1, W3, and W4 of early rice and W2 and W3 of late rice could reduce ineffective tillers and increase earbearing tiller percentage in late tillering stage. The treatment effect of early rice was W4> W1> W3> CK> W2, and that of late rice was W2> W3> W1> CK> W4. The relationship between effective tillers of per plant, earbearing tiller percentage and soil volumetric water content in 5, 10 and 20 cm depth could be fitted by the quadratic curve. Effective tiller number and earbearing tiller percentage reached the highest when 0-20 cm soil volumetric water content reached 47%-55% at late tillering stage after field drainage and drying.

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