| Based on long-term site-specific trials from 1999 to 2006, this paper studied the effects of subsoiling (ST) with mulching and no-till with mulching (NT) on yield and growth characteristics of winter wheat.The results were as following: compared with conventional tillage (CK) , ST and NT could increase the yield of winter wheat with their application going on, and ST was better than NT.Compared with CK, ST increased yield by 4.88%～20.90%, averaging 8.77% for 7 years.NT decreased yield in early application, but it could boost significantly yield in dry years, with an average increasing rate of 3.70% over CK.Under ST and NT treatments, winter wheat grew more slowly, which behaved as falling of plant height, decreasing of leaves of the main stem, tillers per plant, second roots, weight and leaf area index in early growth period.After jointing, winter wheat developed faster under the two kinds of conservational tillage.Except tillers per plant, the others were beyond that of CK.The maximum filling rate was enhanced under the conservational tillage, delaying last filling slowing and prolonging tilling time, so that 1000-grain weight was improved. |