Crop Growth Under The Coated Soil And Soil Ecological Effect Research

In order to alleviate the problems which the traditional ways of plastic film mulching bring, it studied the way of coating under the soil,covering all the field, and how it effected the crop growing and soil environment. This experiment was held in Zhangbei lab of Hebei agricultural university from May to Ocotober in 2009 and 2010. Testing soil is the meadow chestnut soil and the sand chestnut soil. Results show that:1.Crops have automatic broken membrane by crops ability, the strength, to its own characteristics by turns the soil thickness and the influence of membrane thickness. Black substance under plastic film mulching significantly higher than white relative plastic, and two membrane on the inhibition of weeds without obvious difference. In using soil cultivation, under plastic film mulching plastic different thickness of crops are inhibition sprout, and with the increase of the film thickness significantly strengthen; Film thickness of the overlying soil is affecting crop automatic broken membrane effect of the most key factors.2.Conventional mulching film has the obvious, and other processing temperature effect of soil temperature varies is not obvious. The temperature of soil under plastic film mulching treatment luffing below often membrane and matured. In the middle of the day, all the membrane, half membrane and production of various soil is often film cooling process increase, show a certain lags. Is concerned, different processing each ultrasonic horn are performing soil > > matured for a continual membrane whole film > half membrane; Different soil temperature differences between treatment with the deepening and reduce soil.3.The whole film processing of water works best, crop water consumption, the second lowest also half membrane and often membrane, were the lowest. In two different types of soil after harvest the testbed, water storage in the film are highest, lowest, and fertility matured later often membrane and the effect of subsoil half membrane are not significant. Is concerned, the effect of subsoil in sandy soil membrane effect than Richard beautiful, water of the earth south-facing test effect is improved 11.7%.Whole covering the activation of soil microorganism significantly better than any other way, and covered in partial sandy soils more significant synergistic effect.4. Whole covering the activation of soil microorganism significantly better than any other way, and covered in partial sandy soils more significant synergistic effect.5.Two testbed than soil bulk density each cover processing all declined before planting, production increased soil bulk density. Among them with the whole covering bulk handling significantly below other processing. The general effect performance for the film > often membrane >half membrane > the sand beaches matured.6.Often membrane treatment on the influence of crop growth process performance for the prophase > later period, and the whole film performance for late prophase . The crop growth for the promoting function of the overall trends than with any other treatment, often membrane in the highest, and later the membrane were no promoting effect.7.The membrane process in two testbed yield and water use efficiency were significantly higher than other processing. In sand beaches and whole film respectively than often membrane yield increased 47.30% 16.57%, respectively, and water use efficiency improved 63.3%. Keywords: covering film; Soil coated; under Automatic broken membrane; Soil ecological; Green...