陈骎骎, 张明明, 董宝娣, 刘孟雨, 郑鑫, 赵欢. ‘小偃60’在不同水氮条件下的用水特性[J]. 中国生态农业学报(中英文), 2015, 23(10): 1253-1259. DOI: 10.13930/j.cnki.cjea.141429
引用本文: 陈骎骎, 张明明, 董宝娣, 刘孟雨, 郑鑫, 赵欢. ‘小偃60’在不同水氮条件下的用水特性[J]. 中国生态农业学报(中英文), 2015, 23(10): 1253-1259. DOI: 10.13930/j.cnki.cjea.141429
CHEN Qinqin, ZHANG Mingming, DONG Baodi, LIU Mengyu, ZHENG Xin, ZHAO Huan. Water efficient utilization of ‘Xiaoyan 60’ winter wheat under different water and nitrogen conditions[J]. Chinese Journal of Eco-Agriculture, 2015, 23(10): 1253-1259. DOI: 10.13930/j.cnki.cjea.141429
Citation: CHEN Qinqin, ZHANG Mingming, DONG Baodi, LIU Mengyu, ZHENG Xin, ZHAO Huan. Water efficient utilization of ‘Xiaoyan 60’ winter wheat under different water and nitrogen conditions[J]. Chinese Journal of Eco-Agriculture, 2015, 23(10): 1253-1259. DOI: 10.13930/j.cnki.cjea.141429

‘小偃60’在不同水氮条件下的用水特性

Water efficient utilization of ‘Xiaoyan 60’ winter wheat under different water and nitrogen conditions

  • 摘要: 以过筛土壤为培养基础, 以圆形桶为容器, 设置了3个水分梯度(W0、W1、W2, 分别为田间持水量的50%、65%、80%)、4个氮素梯度(N0、N1、N2、N3, 施氮量分别为每桶0 g·kg-1、0.10 g·kg-1、0.20 g·kg-1、0.29 g·kg-1), 探究冬小麦新品系‘小偃60’干物质积累与分配、水分利用效率、光合参数的变化规律, 为其推广及高产高效栽培提供依据。结果表明, 水、氮均对冬小麦生物量及产量、叶片叶绿素含量、叶水势、叶片净光合速率等有显著影响, 且水对籽粒产量的主效应大于氮肥。水分和氮肥适宜处理(W2N2)比水分和氮肥轻度亏缺处理(W1N1)增产66.03%, W1N1比水分和氮肥严重亏缺(W0N0)增产153.30%。在相同水分处理下, 冬小麦叶绿素SPAD值随着施氮量的升高而升高, 而在相同施氮量条件下, 水分严重亏缺处理(W0)和水分适宜处理(W2)的冬小麦叶绿素SPAD值均低于水分轻度亏缺处理(W1)。水分对叶片水势为正效应, 表现为随着土壤含水量的增加显著升高到不明显升高趋势。光合速率(Pn)、蒸腾速率(Tr)、瞬时水分利用效率(WUEi)均随着施氮量的增加而升高, PnTr随土壤水分提高而上升, WUEi却随土壤水分提高而下降。在低氮(N1)或者不施氮肥(N0)条件下, 产量水分利用效率(WUEy)随水分的增加表现先升高而后变化不明显的变化趋势; 在适宜氮肥(N2)和高氮(N3)条件下, WUEy随着水分的增加而升高。通过对试验结果的分析得出如下结论: ①合理的水氮管理使‘小偃60’的籽粒产量及水分利用效率(WUE)维持在较高水平, 过多水肥均引起产量及WUE下降; ②不同水氮下籽粒产量、水分利用效率均与叶片净光合速率显著正相关; ③‘小偃60’在河北环渤海地区更适合在低水中肥条件下种植。

     

    Abstract: Scarcity of freshwater resources is an important factor that limits crop yield in the Bohai Rim in Hebei Province. Appropriate fertilization increases crop water use efficiency and meets demand for nutrient of crops. A pot experiment was conducted to study the effects nitrogen and water on winter wheat in Nanpi Agro-Ecosystem Experimental Station, Chinese Academy of Sciences (11640′E, 3800′N, altitude 1.0 m). Three water levels 50% (W0), 65% (W1) and 80% (W2) of field capacity, four nitrogen levels 0 g(N)·kg-1 (N0), 0.10 g(N)·kg-1 (N1), 0.20 g(N)·kg-1 (N2) and 0.29 g(N)·kg-1 (N3) were respectively set in the pot experiment, and the combinations assessed in a total of 12 experiment treatments. Each treatment was repeated 10 times. The variations in dry matter accumulation and distribution and photosynthetic parameters of winter wheat ‘Xiaoyan 60’ were analyzed. As expected, water and nitrogen significantly increased biomass, grain yield, leaf chlorophyll, leaf water potential, leaf photosynthetic rate and water use efficiency (WUE) of ‘Xiaoyan 60’. The effect of water on winter wheat yield was greater than that of nitrogen. Compared with water and nitrogen deficit (W1N1) treatment, yield increased by 66.03% for the treatment with appropriate water and nitrogen (W2N2). Yield under W1N1 was 153.30% higher than that under severe water and nitrogen deficiency (W0N0). At the same water level, SPAD increased with increasing nitrogen dose. Then at the same nitrogen level, SPAD was lower under severe water stress (W0) and suitable water (W2) treatments than under mild water stress (W1) treatment. Water had a positive effect on leaf water potential, which significantly increased from W0 to W1 but with not obviously increased from W1 to W2. Photosynthetic rate (Pn), transpiration rate (Tr) and instantaneous water use efficiency (WUEi) increased with increasing N dose. Pn and Tr improved and WUEi decreased with increasing soil moisture. Yield and yield water use efficiency (WUEy) increased with increasing water content from W0 to W1 and then remained unchanged from W1 to W2 under N1 or N0 conditions. WUEy of winter wheat under N2 and N3 conditions increased with increasing water content. In conclusion, 1) proper management of water and nitrogen maintained ‘Xiaoyan 60’ grain yield and water use efficiency (WUE) at high levels. Excessive water and nitrogen use decreased grain yield and WUE. 2) Grain yield, WUE and leaf photosynthetic rate were positively correlated with water and nitrogen. 3) ‘Xiaoyan 60’ was more suitable for production at low water and medium fertilizer conditions in the Bohai Rim of Hebei Province.

     

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