Effects of conservation tillage on soil water conservation and crop yield of winter wheat-spring maize rotation field in Weibei highland
Zhang, L.-h.; Li, J.; Jia, Z.-k.; Liu, B.-f.; Zhao, H.-l.; Shang, J.-x.
Ying Yong Sheng Tai Xue Bao 22(7): 1750-1758
2011
ISSN/ISBN: 1001-9332 PMID: 22007451 Document Number: 651215
A field experiment was conducted in 2007-2010 to study the effects of no-tillage, subsoiling, and deep-ploughing combined with balanced fertilization, traditional fertilization, and no (or lower amount) fertilization on the soil water storage, crop yield, water use efficiency (WUE), and economic return of winter wheat-spring maize rotation field in Weibei highland. Among the tillage measures, no-tillage in fallow period had the best effect in soil water conservation, followed by sub-soiling, and deep-ploughing. The average water storage in 0-200 cm soil layer in crop growth period under no-tillage and sub-soiling was 6.7% and 1.9% higher than that under deep-ploughing, respectively. Under the balanced, traditional, and no (or lower amount) fertilizations, subsoiling all showed the highest yield, WUE, and economic return, with the best effect under balanced fertilization. The three-year crop yield under sub-soiling combined with balanced fertilization was 6909, 9689, and 5589 kg x hm(-2), WUE was 18.5, 25.2, and 23.0 kg x hm(-2) x mm(-1), and economic return was 5034, 5045, and 7098 yuan x hm(-2), respectively. It was suggested that balanced fertilization combined with sub-soiling had the best effect in soil water conservation and yield- and income increase, being the more appropriate fertilization and tillage mode for the wheat-maize rotation field in Weibei highland.