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Heilongjiang Bayi Agricultural University (2020)

Effects of Tillage and Sowing Time on Soil Physical and Chemical Properties and Maize Growth in Semi-arid Area of Songnen Plain

张继卫;

Titre : Effects of Tillage and Sowing Time on Soil Physical and Chemical Properties and Maize Growth in Semi-arid Area of Songnen Plain

Auteur : 张继卫;

Grade : Master’s Theses 2020

Université : Heilongjiang Bayi Agricultural University

Résumé partiel
In recent years,the warming of climate has caused the crop growth season to be prolonged,the growth period of maize to be shortened,the planting boundary to move north,to coordinate the contradiction between the growth season and the growth period of maize,and to avoid the bad weather conditions during the critical period of growth and development,which is an urgent problem to be solved in production.For a long time,the traditional single-spin tillage ridge farming method has been widely used in agricultural production in the semi-arid area of Songnen Plain.Based on this,"Xianyu 335" was used as the test material to set up early,middle and late sowing dates(sowing on April 23,May 1 and May 10,respectively).Deep autumn ridges(QSL),deep autumn flattening(QSP),autumn rotary tillage(QSL),autumn rotary tillage culture(QXP),autumn rotary tillage culture with shallow loose(QXQP),autumn rotary tillage culture deepen the pine(QXSP),spring rotary tillage(CKL),spring rotary tillage culture(CKP),no-till(MG)and no-till deepen pine(MGS),10 kinds of farming methods,and early,middle and late sowing dates(sowing on April 23,May 1 and May 10,respectively).The combination of farming methods and sowing date of main physical and chemical properties of soil,the influence of the maize growth and yield.In order to establish a suitable cultivation method for high and stable maize yield in this region,determine an appropriate sowing date,and provide scientific basis and technical support for high and stable maize yield in this region,the research results are as follows:1.The soil moisture content,soil temperature and soil bulk density of maize varied with precipitation and temperature in different growth periods.Soil bulk density can be reduced by0.72%-23.85% in autumn compared with that in spring,6.33%-21.77% lower than that in no-tillage.A low of 6.50%-22.09%,loose soil structure,conducive to the increase of ground temperature.2.The soil structure can be loosened,fertilizer infiltration can be increased and soil enzyme activity and soil nutrient can be increased.Maize under early sowing treatment,full growth,strong root metabolic activity,increased root exudates,can improve soil enzyme activity and soil nutrient content.Therefore,early sowing can improve soil enzyme activity and soil nutrient content,which is helpful to high yield of maize.3.Flat cropping,deep tillage and spring tillage could increase root activity,increase dry matter accumulation and leaf area index,increase chlorophyll content,increase dry weight of maize,and increase maize yield

Mots clés : sowing date; tillage method; soil physical and chemical properties; maize growth;

Présentation (CNKI)

Page publiée le 24 octobre 2020