Affiliation:
1. College of Urban and Rural Construction, Shanxi Agricultural University, Jinzhong 030801, China
2. College of Agriculture, Shanxi Agricultural University, Jinzhong 030801, China
Abstract
The ridge–furrow with plastic film mulching (RF) system has been widely adopted in rain-fed crop planting due to its potential to enhance crop yield and water use efficiency. However, the impact of the RF system on maize lodging resistance, particularly when nitrogen fertilizer is applied, remains uncertain. Therefore, a two-year field experiment was carried out with two planting systems (FP: flat planting and RF) and two nitrogen application rates (N180: 180 kg·N ha−1 and N300: 300 kg·N ha−1) to assess the risk of lodging in maize. The results showed that compared to FP, RF resulted in a significant increase of 78.7% in lodging rate. In addition, the lodging rate increased by 22.6% with increasing nitrogen fertilizer application. The lignin content increased by 43.4%, while the stalk bending strength rose by 42.5%, under RF compared to the FP system. These improvements in the mechanical properties of maize stalks contributed to the improved lodging resistance index of RF, which was found to be approximately 21.3% higher than that of FP. In addition, high nitrogen application rates increased the risk of lodging for different planting patterns over two years. In conclusion, fertilization of spring maize with 300 kg·N ha−1 under the RF system led to higher yields but increased lodging rates. The risk of lodging should be considered when planting maize under the RF system. The results of this study can provide scientific basis and technical support for the optimization of rain-fed maize cultivation measures in the Loess Plateau.
Funder
Basic Research Project of Shanxi Province, Science and Technology Department of Shanxi Province
Doctoral Research Starting Project at Shanxi Agricultural University, Agricultural University
Doctoral Graduates and Postdoctoral Researchers from Shanxi Province Come to Work to Reward Scientific Research Projects, Science and Technology Department of Shanxi Province
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