| 江淮丘陵区水稻钾、氮吸收特性与施钾效应研究 |
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| 引用本文： | 刘枫,何传龙,王道中,王本豹.江淮丘陵区水稻钾、氮吸收特性与施钾效应研究[J].土壤通报,2006,37(2):314-317. |
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| 作者姓名： | 刘枫 何传龙 王道中 王本豹 |
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| 作者单位： | 1. 安徽省农业科学院,土壤肥料研究所,安徽,合肥,230031
2. 安徽省长丰县罗集乡农业综合服务站,安徽,合肥,231129 |
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| 基金项目： | 国际钾研究所(LPI)资助项目 |
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| 摘 要： | 江淮地区水稻田间小区施钾效应试验结果表明,施钾能明显提高水稻产量,改善水稻生育性状,在氮磷肥充足时,钾肥的增产效果极其显著。水稻钾吸收量明显以秸秆吸钾量为主,约为籽粒吸钾量的5倍。N来自土壤的数量为120.30 kg hm-2;K2O来自土壤的数量为72.83kg hm-2。NPK全素施钾处理吸钾总量平均高出NP处理48.79%,籽粒和秸秆分别平均增加9.21%和56.8%;说明钾吸收量增加对秸秆产量贡献明显小于对籽粒产量的贡献。除最高施钾量和不施氮处理外,其余处理均出现不同程度钾素亏缺,说明在不施氮肥或氮肥不足的情况下,水稻对肥料钾的吸收量也相应减少。本试验钾肥(K2O)产投比以NPK2处理最高为2.54。综上所述,本地区同等肥力土壤,水稻钾肥推荐用量为120kg hm-2,根据土壤钾素平衡状况,水稻施钾量可适当增加。
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| 关 键 词： | 江淮地区 水稻 施钾效应 |
| 文章编号： | 0564-3945(2006)02-0314-04 |
| 修稿时间： | 2004年12月15 |
Absorption Characteristic of Potassium and Nitrogen by Rice and Response to Potassium Application in Jianghuai Hilly Region |
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| LIU Feng,HE Chuan-long,WANG Dao-zhong,WANG Ben-bao.Absorption Characteristic of Potassium and Nitrogen by Rice and Response to Potassium Application in Jianghuai Hilly Region[J].Chinese Journal of Soil Science,2006,37(2):314-317. |
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| Authors: | LIU Feng HE Chuan-long WANG Dao-zhong WANG Ben-bao |
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| Abstract: | The field experiment of rice was conducted to study rice response to potassium application in Jianghuai region,Anhui province.The results showed that potassium application could obviously increase yield and improve growth characteristics of the rice significantly.The total amount of K-uptake in the NPK treatment increased by 48.79% compared with the NP treatment on average,while grain and straw increased by 9.21% and 56.8%,respectively on average.All treatments occurred K-deficiency at different degrees except for the highest K and NP treatment,suggesting K-uptake by rice decreased accordingly under circumstance of lack of nitrogen fertilizer. |
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| Keywords: | Jianghuai region Rice Potassium application effect |
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