| Effects of mulching straw at different rates on water use pattern and soil properties of dry-land wheat |
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| DOI：10.7606/j.issn.1000-7601.2017.04.33 |
| Key Words: stalk rate dry-land wheat water consumption characteristic soil properties |
| Author Name | Affiliation | | LI Yu-peng | Institute of Water Saving Agriculture in Arid Areas of China, Northwest A & F University, Yangling, Shaanxi 712100, China
Nanyang Academy of Agricultural Science, Nanyang, Henan 473000, China
Nanyang Experiment and Demonstration Station of Wheat, Northwest A & F University, Nanyang, Henan 473000, China | | JIA Zhi-kuan | Institute of Water Saving Agriculture in Arid Areas of China, Northwest A&F University, Yangling, Shaanxi 712100, China
College of Agronomy, Northwest A&F University, Yangling, Shaanxi 712100, China | | HAN Qing-fang | Institute of Water Saving Agriculture in Arid Areas of China, Northwest A&F University, Yangling, Shaanxi 712100, China
College of Agronomy, Northwest A&F University, Yangling, Shaanxi 712100, China | | WANG Cheng-she | Nanyang Experiment and Demonstration Station of Wheat, Northwest A & F University, Nanyang, Henan 473000, China
College of Agronomy, Northwest A & F University, Yangling, Shaanxi 712100, China | | XIE Yan-zhou | Nanyang Experiment and Demonstration Station of Wheat, Northwest A & F University, Nanyang, Henan 473000, China
College of Agronomy, Northwest A & F University, Yangling, Shaanxi 712100, China | | WEI Hong-sheng | Nanyang Experiment and Demonstration Station of Wheat, Northwest A & F University, Nanyang, Henan 473000, China
College of Agronomy, Northwest A & F University, Yangling, Shaanxi 712100, China |
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| Abstract: |
| To yield a penetrating insight into the effects of straw mulching on water use pattern and soil properties of dry-land wheat, we conducted field experiments with four treatments of corn stalk mulching rates, 0 (control rate), 3 000, 6 000, 9 000 kg·hm-2 in semiarid areas of southern Ningxia for two consecutive years. The result indicated that the water consumption of wheat at different growth stages gradually decreased with the increase of straw mulch. For the straw mulching quantity of 3 000, 6 000 kg·hm-2 and 9 000 kg·hm-2, the average water consumption during the whole growth period of wheat was decreased by 12.7%, 21.6% and 27.5%, respectively compared with the control, and the amount of straw showed a significantly negative correlation with that of water consumption(P＜0.01). The effect of straw mulching on soil moisture conservation was significant. For the straw mulching quantity of 3 000, 6 000 kg·hm-2 and 9 000 kg·hm-2, soil moisture content increased by 13.1%, 19.8% and 26.1% after harvest. After straw mulching, the water use efficiency was the largest in the amount of 9 000 kg·hm-2, being increased by 42.4%（P＜0.01）compared with the control. With the straw mulching amount of 3 000, 6 000 kg·hm-2 and 9 000 kg·hm-2, the wheat yield in different mulching modes was increased by 2.9%～16.7%, but only the difference between 3 000 kg·hm-2 mulching mode and the control reached the significant level(P＜0.01). Straw mulching could apparently adjust soil temperature at the upper layer（0～10 cm）that can not vary dramatically between extremes. All these effect is useful for the wheat growing. Straw mulching could increase available N, available K and organic matters, which much more helped crops taking up P from soil. |
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