Effects Of Permanent Raised Bed Tillage On Soil Moisture, Temperature And Yield Of Spring Wheat

For the waste of water resources caused by flood irrigatio n in traditionalcultivation methods, the tractor in the field walking, resulting in large areas of soilcompaction, soil tillage resistance phenomenon. Combined with wheat PermanentRaised Bed techniques, based on field experiments and laboratory analysis, the threetreatments on soil temperature of the Hexi Corridor of Spring Wheat conventionaltillage (CT), flat, fixed Road (ZT), and Permanent Raised Bed (PRB), moisture, andyield of the system. The following conclusions:1. Throughout the growth process, the sowing and the seedling stage, PRB andZT treatment to reduce the temperature effect, spring wheat jointing stage to harvestPRB and ZT deal with a warming effect. As temperatures rise, the the PRB processingthan other treatments significantly increased soil temperature difference between dayand night, four periods of highest soil temperature differences between differentfarming methods are greater than the lowest temperature.The PRB deal with the warming effect of the performance of daily maximumtemperature increased sharply. PRB in the active stage of spring wheat for thewarming effect, and its warming effect is due to significantly improve the minimumtemperature and maximum temperature of the reasons. The ZT cooling effect is due toa greater degree of reduction of the maximum temperature to a lesser extent theincrease in the minimum temperature, the but ZT cooling effect is not obvious. Ridgeof fixed Road (PRB) on the absorption of solar radiation conversion and heatconduction has a greater impact, can significantly increase soil temperature, soiltemperature is warming, cooling too fast. The soil temperature is greater than changesin soil temperature, and therefore along the soil depth direction, depth, increase in soiltemperature leveled off. Either conventional tillage (CT), or conservation tillagecontrolled traffic (PRB and ZT), the overall trend of soil temperature with thetemperature change, change, and gradually decreased with increasing soil depth; PRBdeal with the warming effect more obvious. 2. Controlled traffic conservation tillage on soil moisture has a significant impact.PRB surface water content, sprouting-the three-leaf stage and jointing-bootingstage, heading-filling and post-harvest of spring wheat in different soil layers soilmoisture showed PRB> ZT> trends in CT and ZT deal with straw mulch, stage ofgrowth and changes in soil moisture is more stable. Spring wheat throughout thegrowing period, each measured period PRB and ZT soil storage capacity is almosthigher than that of CT. Leaving crop residues and straw at the soil surface is mainlydue to the handling of the spring wheat growth and pre-PRB, a fixed channel andridge for the measures of conservation tillage, reduced soil evaporation, good savingwater effect, the0-20cm soil moisture adequate for surface root growth and theground organization growth needs to provide a good moisture conditions. PRB dealwith the whole growth period of0-20cm,20-80cm and0-100cm storage compared toCT processing of42.97%,14.56%and29.68%, respectively, can be seen from thespring wheat soil moisture PRB water water-holding capacity is best..3. With the increase of years of controlled traffic planting, controlled trafficconservation tillage on spring wheat yield effect. Compared with conventional tillage(CT), PRB treatment can significantly improve the yield of spring wheat in the firstyear of the controlled traffic conservation tillage trials, the PRB is less than CT PRBproduction in2007,2009and2010were higher than other treatments. With theincrease of planting years, the three-year average yield the PRB processing yield,respectively, higher than CT treatment673.35,160.00and1584.34kg/hm2. ZT dealwith four-year cumulative yield less than conventional tillage may be due to the fixedRoad due to reduced acreage. Affected by the soil thermal effects, conservation tillagecontrolled traffic the PRB handling grain weight, grain weight, grain number is topromote its yield factors. Regardless of the level for the fixed-Road or ridge for fixedRoad, evapotranspiration and water consumption is less than conventional tillage,water use efficiency was significantly higher than that of traditional farming, play theeffect of saving water, but the more obvious ridge for water-saving effect of fixedRoad..Controlled traffic conservation tillage can effectively improve the productivity of wheat field soil, may help to improve the wheat fields of soil moisture andtemperature, thereby increasing the yield. Different tilla ge wheat accumulatedfluctuations in the yield curve. Handling stability coefficient SYI, CT>ZT>PRB, thecoefficient of variation:CT<ZT<PRB, therefore,CT deal with the highest yieldstability, the PRB affected by irrigation, temperature, rainfall, fertilizer applicationand the external environment impact.