| This article has been：Browse 1939Times Download 2297Times |
scan it! |
|
|
| DOI：10.13522/j.cnki.ggps.20180244 |
|
| The Effects of Different Cultivations with Film Mulch on Yield and Water Use Efficiency of Soybean in Different Climatic Regions |
|
ZHOU Delu, LIU Guangcai*, LI Chengde, YOU Yanrong, LI Yuan, LI Bowen
|
|
Gansu General Station of Agro-technology Extension, Lanzhou 730020, China
|
| Abstract: |
| 【Objective】Planting seeds in the furrows within fully mulched micro-ridge cultivation is an innovative method to reduce evaporation and enhance rainfall infiltration in arid and semi-arid regions. Taking soybean as a model plant, this paper aims to study its effect on yield of the soybean grown in different ecological regions. 【Method】We investigated three cultivations: fully mulched micro-ridges with the seeds planted in the furrows (T1), mulched double ridges with the seeds planted in the furrows (T2), mulched flatten soil surface with the seeds planted by drill (T3). The control was without mulching and ridging. The experiment was conducted from 2014 to 2016 in three climatic regions: a semi-humid and light-arid region, a semi-aid region, and a light-arid region. For each treatment in the three regions, we measured the soybean yield and its water use efficiency (WUE). 【Result】T1 gave the highest yield in all three regions, followed by T2. The efficacy of T1 in increasing crop yield was ranked in semi-humid and light-arid region> semi-arid region > semi-arid and light-arid region. Compared with CK, T1-T3 increased the average yield by 58.5%, 78.1% and 95.3%, and WUE by 65.9%, 57.6% and 56.1% respectively. For the arid region with annual rainfall between 500 mm and 600 mm, the average yield under T1 was 4 318.2 kg/hm2 and the highest was 4 353.3 kg/hm2, increasing 58.5% compared to that under CK. 【Conclusion】 Fully mulched micro-ridge cultivation with soybean seeds planted in the furrows in rain-fed semi-arid region in northwest China can significantly increase yield and water use efficiency. |
| Key words: rain-fed semi-arid area; fully plastic-film mulching micro-ridges; yield; economic effect; soybean |
|
|
