| In order to explore the water effects of different covering retention cultivation measures about two crops a year, typical dryland corn-cole field trials were done to compare the soil water storage, degree of water storage, water consumption intensity, and other economic indicators of different covering retention cultivation measures. The study aimed at revealing different water use mechanisms of covering retention cultivation measures. The results showed that, straw and mulching had some effect on water retention, especially the effect of straw-mulch cover was the most prominent. The soil water storage and degree of water protection showed treatmentⅠ> treatment Ⅱ> treatment Ⅲ> treatmentⅣ, and the 0-30cm change>30-60cm change>60-100cm change, showing that 0-30 cm soil moisture change more active, 30-60 cm soil moisture change relatively stable, 60-100 cm soil moisture change the most stable. Economic benefits of different water cultivation measures increased 11.39%-26.50%, showing the covering retention water cultivation was feasible to improve the agricultural production efficiency of dry hot valley. |
