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中国农学通报

中国农学通报 ›› 2007, Vol. 23 ›› Issue (8): 121-121.

所属专题： 水稻

• 农学 农业基础科学 • 上一篇    下一篇

不同栽培模式下早稻-再生稻的养分积累与分配特性

林瑞余,,陈鸿飞,邓家耀,梁义元,梁康迳,林文雄,   

  • 出版日期:2007-08-05 发布日期:2007-08-05

The properties of the accumulation and partitioning of nutrients in early season and ratoon rice(Oryza sativa L) under different cultivation models

Lin Ruiyu,, Chen Hongfei, Deng Jiayao, Liang Yiyuan, Liang Kangjing, Lin Wenxiong,,   

  • Online:2007-08-05 Published:2007-08-05

摘要： 【研究目的】探讨不同栽培模式早稻-再生稻水稻的养分积累动态和分配特征；【方法】以杂交水稻新组合Ⅱ优航1号为材料，采用超高产栽培 (SHC)和常规栽培(CC)模式，通过测定水稻各生育期的干物质积累和养分含量变化；【结果】超高产模式头季稻稻株N含量在全生育期均高于常规模式，孕穗前稻株P含量、黄熟前及再生稻K含量亦明显高于常规模式。超高产模式头季稻完熟期积累的N、P、K依次达15.06 g/m2、4.58 g/m2、15.8 g/m2，分别比常规模式高出47.2%、21.2%和低9.1%；分配到籽粒的N、P、K比例依次为50.5%、47.8%、25.3%，与常规栽培相近；N、P、K生产效率依次为75.39 kg/kg、247.9 kg/kg、71.9 kg/kg，P、K生产效率略高于常规栽培。超高产模式再生稻完熟期积累的N、P、K依次达10.9 g/m2、4.05 g/m2、12.9 g/m2，比常规模式高出38.0%、30.5%和78.3%；分配到籽粒的N、P、K比例依次为51.0%、68.1%、15.5%，N、K分别比常规模式低9.1%和7.0%；N、P、K生产效率依次为75.60 kg/kg、203.5 kg/kg、63.9 kg/kg；N、K生产效率低于常规栽培的。超高产模式头季稻的N、P、K需求量为：17.9 g/m2、6.77 g/m2、34.9 g/m2，比常规模式高出54.3%、35.4%、73.6%，再生稻N、P、K需求量为：9.59 g/m2、3.61 g/m2、17.20 g/m2，比常规栽培高出61.2%、43.8%、361.1%；【结论】超高产模式下水稻养分需求量大，转运比较顺畅，促进水稻高产的形成，但N、K生产效率有待进一步提高

关键词: 干旱胁迫, 干旱胁迫, 匍匐茎植物, 蕨麻, 克隆构件, 可塑性反应

Abstract: 【OBJECTIVE】The objective was to reveal characteristics of nutrients accumulation and distribution in early and ratoon rice under different cultivation models; 【METHOD】Dry weight and nutrients contents in the rice plants were determined at different developmental stages, using a new combination hybrid rice II Youhang 1 under super high-yield cultivation (SHC) and conventional cultivation(CC) models;【RESULTS】The results showed that the accumulated N, P and K in the plant were 15.06 g/m2, 4.58 g/m2 and 15.8 g/m2 at the fully ripening stage under SHC models, which were 47.2%, 21.2% higher and 9.1% lower than those under CC models respectively. The nutrients partitioned into grain were 50.5%, 47.8% and 25.3%, they were approximately equal to those as mentioned above. The production efficiencies of N, P and K were 75.39 kg/kg, 247.9 kg?kg-1 and 71.9 kg/kg respectively, showing higher use efficiency of P and K. The accumulated N, P and K in ratoon rice plants were 10.9 g/m2, 4.05 g/m2 and 12.9 g/m2respectively at fully ripening stage, which were 38.0%, 30.5% and 78.3% higher than those CC models. The partitioned ratio of nutrients into grain were 51.0%, 68.1% and 15.5%, which was 9.1% lower for N and 7.0% lower for K than that in rice under CC models. The use efficiencies of N, P and K were 75.60 kg/kg, 203.5 kg/kg and 63.9 kg/kg respectively, showing lower use efficiency of N and K for SHC models. The demands for N, P and K in the early season rice in SHC models were 17.9 g/m2, 6.77 g/m2, 34.9 g/m2, which were 54.3%, 35.4% and 73.6% higher than those in CC models respectively, and 9.59 g/m2 N, 3.61 g/m2P, 17.20 g/m2 K were needed in the ratoon rice crop, showing 61.2%,43.8% and 361.1% higher than those in CC models;【CONCLUSION】In a word, a higher nutrients demand, accompanying with more smoothly absorption and translocation of N, P and K which were beneficial to nutrients partition in the plants and enhanced production, but further effort must be made to enhance the utilization efficiency of N and K.

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