| 水肥与保水剂处理对小桐子生长与水分利用的影响 |
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| 引用本文： | 荣烨,杨启良,江玉波,刘小刚,刘艳伟,王卫华.水肥与保水剂处理对小桐子生长与水分利用的影响[J].排灌机械,2014(11):1005-1012. |
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| 作者姓名： | 荣烨 杨启良 江玉波 刘小刚 刘艳伟 王卫华 |
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| 作者单位： | 1. 昆明理工大学现代农业工程学院,云南 昆明,650500
2. 昆明理工大学理学院,云南 昆明,650500 |
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| 基金项目： | 国家自然科学基金资助项目(51009073，51379004，51109102)；国家863计划项目 |
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| 摘 要： | 为了探明保水剂与水肥处理对小桐子幼树生长与水分利用的影响,通过盆栽试验,研究了2种供水模式（重度水分亏缺W1,40%ET;轻度水分亏缺W2,80%ET）、2种施氮水平（N1：0.25g/kg风干土;N2：0.5 g/kg风干土）和2种保水剂水平（S1：0;S2：2 g/kg风干土）对小桐子幼树生长和水分利用率的影响.结果表明：1在N2S2条件下,与W2相比,模式W1的小桐子总干物质质量减少7.2%,而总水分利用率显著增高43.2%;W2S2条件下,与N1相比,水平N2的小桐子总干物质质量和总水分利用率分别显著增加14.4%和10.5%.有利于小桐子幼树生长的保水剂与水肥的最优组合为S2W2N2.2采用施加保水剂处理的小桐子具有显著提高根系、冠层和整株的干物质质量的作用.在水平N2下,与处理S1W2相比,处理S2W1在节水达35.1%情况下,株高增长29.0%、蒸散量减少了45.3%,而根系、冠层和总干物质的质量分别显著增多14.5%,21.8%和20.3%,因此水分利用率显著提高98.6%.
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| 关 键 词： | 小桐子 保水剂 灌水量 水分利用率 |
Effects of water,fertilizer and super absorbent polymer on growth and water use efficiency of Jatropha curcas L. |
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| Rong Ye,Yang Qiliang,Jiang Yubo,Liu Xiaogang,Liu Yanwei,Wang Weihua.Effects of water,fertilizer and super absorbent polymer on growth and water use efficiency of Jatropha curcas L.[J].Drainage and Irrigation Machinery,2014(11):1005-1012. |
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| Authors: | Rong Ye Yang Qiliang Jiang Yubo Liu Xiaogang Liu Yanwei Wang Weihua |
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| Institution: | Rong Ye, Yang Qiliang, Jiang Yubo, Liu Xiaogang, Liu Yanwei, Wang Weihua(1. Faculty of Modem Agricultural Engineering, Kunming University of Science and Technology, Kunming, Yunnan 650500, China; 2. Faculty of Science, Kunming University of Science and Technology, Kunming, Yunnan 650500, China) |
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| Abstract: | A series of pot grown experiments are conducted to investigate effects of water, fertilizer and super absorbent polymer（SAP） on saplings growth and water use efficiency of Jatropha curcas L.. Two watering levels, i.e. W1 ： 40% ET and W2 ： 80% ET, two fertilizer levels, N1 ： 0.25 g/kg and N2 ： 0.5 g/kg） as well as two SAP levels, S1 ： 0 g/kg and S2 ： 2 g/kg are applied in the experiments. The results show that under N2S2 condition, the total dry mass of Jatropha curcas L. in W1 treatment is significantly reduced by 7.2% and the water use efficiency is increased by 43.2% compared with W1 treatment. Under W2S2 condition, however, the total dry mass and water use efficiency of the plant are increased 14.4% and 10. 5% in W2 treatment, respectively, compared with N1 treatment. Hence, S2W2N2 should be the best condition for the saplings of Jatropha curcas L. to grow. Further, SAP can significantly improve the root system, extend the canopy and add the whole plant dry mass. At N2 level, under S2W1 condition, water is saved by 35.1% . the plant height rises by 29.0% and the evapotranspiration quantity is reduced by 45.3 % ; fortunately, the root and canopy mass as well as the total dry mass are heaved by 14.5% , 21.8% and 20.3% , respectively, causing an as high as 98.6% total water use efficiency, compared with S1W2 condition. Therefore, applying SAP can suppress evapotranspiration quantity and reduce the loss of water in soil ; additionally, it promotes the accumulation of dry mass in the plants by means of the coupling effect with fertilizer. Eventually, the water use efficiency can be improved greatly. |
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| Keywords: | Jatropha curcas L super absorbent polymer irrigation amount water use efficiency |
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