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首页> 外文期刊>Agricultural Water Management >Effects of different fertilizer strategies on soil water utilization and maize yield in the ridge and furrow rainfall harvesting system in semiarid regions of China
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Effects of different fertilizer strategies on soil water utilization and maize yield in the ridge and furrow rainfall harvesting system in semiarid regions of China

机译：不同肥料策略对我国半干旱地区岭土壤水利利用和玉米产量的影响

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摘要

Shortages of water resources and low soil fertility are two key factors that limit crop production in semiarid areas. The ridge and furrow rainfall harvesting (RFRH) system is an effective method for enhancing the efficiency of rainfall water use and fertility. In this study, we conducted a field experiment over five years (2012-2016) to determine the effects of different fertilizer application rates on the soil water consumption properties, water use efficiency, and maize yield under RFRH. We found that the evapotranspiration (ET), maize dry matter (DM), water consumption strength (CD), and soil water use rate (SP) increased with the fertilizer application rate. Compared with the no fertilizer treatment (RCK), ET, DM, CD, and SP increased significantly by 7.2%, 38.3%, 16.4%, and 37.6% under high fertilizer (RH) treatment, respectively, by 6.7%, 35.8%, 18.0%, and 39.1% with medium fertilizer (RM) treatment, and by 5.5%, 31.1%, 16.1%, and 32.6% with low fertilizer (RL) treatment. RM achieved the highest average yield of 11.3 t ha(-1) and the lowest coefficient of variation at 12.9%. The yield, DM, and water use efficiency did not differ significantly between RH and RM. Regression analysis showed that the highest yield could be obtained by applying nitrogen at 265.0 kg ha(-1) combined with P2O5 at 132.5 kg ha(-1). The yield and water use efficiency were significantly higher under RL compared with RH and RM in wet year. However, in both normal and drought years, the grain yield and water use efficiency was significantly higher under RM. These results indicate that the RFRH system can promote crop use of fertilizers by regulating soil moisture. The best fertilization strategy for planting maize with RFRH system was 265.0 kg ha(-1) of pure nitrogen combined with 132.5 kg ha(-1) of P2O5 in the semiarid area of the Loess Plateau, in China.
机译：水资源短缺和低土壤肥力是两个关键因素，限制了半干旱地区的作物生产。山脊和沟壑降雨收获（RFRH）系统是提高降雨用水和生育能力效率的有效方法。在本研究中，我们在五年（2012-2016）中进行了一个田间实验，以确定rffl下不同肥料应用率对土壤耗水性能，水使用效率和玉米产量的影响。我们发现蒸散蒸腾（ET），玉米干物质（DM），耗水强度（CD）和土壤用水率（SP）随施肥率而增加。与NO肥料处理（RCK），ET，DM，CD和SP相比，在高肥（RH）处理中分别在高肥料（RH）处理下显着增加了7.2％，38.3％，16.4％和37.6％，达到6.7％，35.8％，中肥（RM）治疗18.0％和39.1％，含有5.5％，31.1％，16.1％，32.6％，肥料（RL）处理。 RM实现了11.3吨HA（-1）的最高平均产率，最低的变异系数为12.9％。 RH和RM之间的产量，DM和水使用效率没有显着差异。回归分析表明，通过在265.0kg ha（-1）的氮气在132.5kg ha（-1）中，可以通过将氮气施加氮来获得最高产率。与RH和RM在潮湿年的RL相比，RL和水使用效率明显高。然而，在正常和干旱年份，谷物产量和水使用效率在RM下显着高。这些结果表明，RFRH系统可以通过调节土壤水分来促进肥料的作物使用。用RFRH系统种植玉米的最佳施肥策略是265.0kg Ha（-1）纯氮，加上黄土高原的半干旱地区P2O5的132.5千克（-1）。

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