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Soil moisture and temperature variation under post-sowing packing during growing season of North China Plain winter wheat
Published by the American Society of Agricultural and Biological Engineers, St. Joseph, Michigan www.asabe.org
Citation: 2018 ASABE Annual International Meeting 1800200.(doi:10.13031/aim.201800200)
Authors: Caiyun Lu, Hongwen Li, Jin He, Qingjie Wang, Zhijun Meng, Liwei Li
Keywords: Post-sowing packing, soil moisture content, soil temperature
Abstract. A field experiment with split plot experimental design was conducted in North China Plain to evaluate the impact of post-sowing packing methods on soil properties, yield and its components. Main plots were post-sowing packing methods: (1) seedbed packing (SP); (2) once whole-field packing (OWFP) and (3) twice whole-field packing (TWFP). Soil depth layer of surface, 20cm, 40cm and 60cm were considered as sub plots. Soil moisture and temperature were tested during wheat growing season. Yield and its components were also measured in this study. Results showed that post-sowing packing methods and soil depth both had significant impacts on soil moisture content, and the maximum soil moisture content was measured at 60cm soil layer under SP operation and the minimum soil moisture content was obtained from TWFP operation at surface soil during wheat growing season. The differences between soil temperatures in different methods were significant only at the beginning and last stage of growing season. Although the shoot length in SP treatment was 7.07% and 5.99% lower than OWFP and TWFP treatments, however, the increment of grains per spike and spikes per ha in SP treatment resulted in 21.40% and 12.88% higher yield compared to OWFP and TWFP treatments, respectively. The increment of yield and its components found in SP treatment was probably caused by the increase of soil moisture content in this method. In conclusion, SP appears to be an optimal post-sowing packing method for wheat sowing in North China Plain.
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