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| DOI：10.13522/j.cnki.ggps.20180061 |
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| Impact of Different Tillage on Dynamics of Soil Moisture and Nutrient and the Growth of Spring Maize in Newly Reclaimed Land |
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ZHANG Yu, FENG Shaoyuan, SU Tong, ZHONG Zhaoyi, WANG Juan
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School of Hydraulic, Energy and Power Engineering, Yangzhou University, Yangzhou 225009, China
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| Abstract: |
| 【Objective】 The purpose of this paper is to study experimentally the change in soil moisture and nutrients under different tillage, as well as their consequent impacts on growth and yield of spring maize grown in reclaimed land. 【Method】 Field experiments were carried out under four tillage practices: traditional tillage (CK), plastic film mulching (FM), straw incorporation (BS), and straw incorporation with plastic film mulching (F+S). In each treatment, we measured changes in soil water, soil fertility and maize yield. 【Result】 ①Compared to CK, the average water contents in 0~20 cm and 20~40 cm under F+S, BS and FM increased by 14.4% and 0.2%, 13.0% and 9.1%, 10.7% and 1.1% respectively during the growth season of the maize. ②Compared to CK, FM and BS, F+S increased the average soil organic matter contents in 20~40 cm and 40~60 cm by 25.2% and 12.5%, 8.5% and 12.4%, 15.6% and 5.9%, respectively, from seedling stage to filling stage. Available nitrogen in 20~40 cm and 40~60 cm under F+S, BS and FM increased by 20.7% and 22.4%, 7.6% and 20.4%, 18.7% and 6.3% respectively, compared to CK during the growth season. ③The impacts of different treatments on plant height, leaf area index and stem diameter ranked in F+S>FM>BS>CK. The yields under F+S, BS and FM was significantly higher than that under CK, increasing by 15.9%, 10.5% and 5.6% respectively. 【Conclusion】Among all treatments, F+S appeared to be the best in improving soil water storage and nutrients, thereby offering a suitable cultivation method for sustaining spring maize production in newly reclaimed lands. |
| Key words: newly reclamation land; straw incorporation; plastic film mulching; soil water and fertility; spring maize |
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