Dissertation > Excellent graduate degree dissertation topics show

Study on Yield and Water Effect and Physiological Properties of Wheat and Corn under Supplementary lrrigation with Catchment Rainfall in Semi-Arid Area of Central Gansu

Author: QinShuHao
Tutor: NiuJunYi
School: Gansu Agricultural University
Course: Crop Cultivation and Farming System
Keywords: Effect of Yield and Water Physiological properties Supplementary Irrigation with Catchment R.ailfall Semi-Arid Area Wheat and corn
CLC: S311
Type: Master's thesis
Year: 2000
Downloads: 148
Quote: 5
Read: Download Dissertation

Abstract


The field experiment was carried out at the trial station of Dingxi county in semi-Arid Area of central Gansu in Match-November, 1999. Wheat and corn were selected to study as trial crop, and supplementary irrigation(S.I.) quantities and S.I. stages were selected as trial factor. Yield and water effect and physiological properties of wheat . corn and wheat/corn were studied making use of catchment rainfall installations what have existed and natural precipitation. The results of experiment showed that it has improved the level of yield and water use efficiency(WUE) of crop under S.I., and there were compensation or over-compensation effect for dry-land farming crop. 1. Yield of crops were increased under limited S.I. with catchment rainfall, arid the yield of S.I. treatments of several cropping patterns were higher than that of CK, and yield of them rise with increasing of S.I. quantities. Extents of increasing production were obvious different in different S.I. stages. Among sole-wheat treatments, there was highest grain production when irrigated by 81mm water in jointing + booting stage, it was rise 78.1% than that of WCK; Meanwhile, there was higher yield when irrigated by 40.5mm water in jointing + booting stage, and compared to CK, efficiency of increasing production was 70.2%; The sole-film corn has highest yield when irrigated once by 120mm water in big-horn stage , it increased production 40.24% than that of CCK. There was an over-compensation effect for yield (32.37%) when irrigated once by 60mm water in big-horn stage; Because of competitive using soil moisture of two kinds of crop, wheat/corn has more distinct increase production effect. Compared to the CK, S.I. treatments had increasing production extent of 35.0-80.9%. There has highest yield when irrigated by 42mm water in jointing + booting sage of wheat and 90mm water in before tassel +fihling stage of corn. Efficiency of S.I. of irrigation more times in different stages were superior to irrigation once at the same amount of water. 2. S.I. had improved WUE of crop, and WUE of S.I. treatments of three cropping patterns were higher than that of the CK. Among of sole-wheat and sole-corn treatments, WUE and IWUE were reduced with a increasing amount of S.I. quantities, especially IWUE more.The order of IWUE of the sole-wheat in different S.I. stages was jointing ooting>booting>jointing; and the onler of WUE was booting> joingting眀ooting> joingting; Compared to the CK, WUE was rise by 68.0%-b 58.0%and 40.0% , respectively; Both of the order at different 8.1. stage was the big-horn stage>joingting+big-hom stage>joingting. Compared to the CK,WUE increased by 11 .02% 8.47% and 4.24%, respectively; WUE of wheat/corn rise when irrigated within 0-105mm water, and reduced when irrigated within 105-180mm water, its maximum was 0.939kg/mu.mm(lOSmm); IWUE reduced continually with increasing S.I. quantities. The maximum of IWUE was 2.67kg/mu.mm(45mm), and its minimum was l.O6kg/mu.mm(l8Omm); The mean WLTE of S.f. treatment increased by 35.76% compared to WCCK when irrigated within 105-150mm water. 3. Wheat and corn were contented with demand of soil moisture for 8.1. enhanced diy matter(DM) accumulation. expanded canopy .. improved photosynthesis increased LAI and LAD of them; Mean photosynthesis . mean LAI and mean LAD of S.f. treatments of wheat were increased by l38.39%- 59.26% and 55.32% than that of the WCK. Among of them, LAD and yield were suited to next equation:y- 85.8873+1 8.6599SQR(x)(r=0.9503**). S.I. increased DM accumulation and partitioning

Related Dissertations

  1. Studies on Water Consumption Characteristics of Main Ecosystem Tree Species in Semi-arid Region on Loess Plateaus of Shanxi,S718.4
  2. Discussion on the Soil Water Characteristic Curve and Nitrogen Distribution of the Agricultural Soil in Shunyi of Beijing,S152.7
  3. Study on Water and Fertilizer Coupling Pattern of Drip Irrigation Soybean in the Western Semi-arid Area of Heilongjiang Province,S565.1
  4. The Experimental Study on Furrow Irrigation Pattern of Corn in Semi-Arid Region of Western Heilongjiang Province,S513
  5. Effect of Water Stress on Eco-Physiology Index for Wheat﹠corn in North China Plain,S513
  6. Study on Diversity of Water-using Mechanics of Dominant Plants of Artifical Robinaia Pseudoacacia Forest,S792.27
  7. Different Variation Type’s Bamboo with Bamboo’s Biology and the Physiology Characteristics,S795
  8. The Research on Bambusa Chungii’s Characteristics of Biology and Physiology in Different Climate Regions,S795
  9. Study on Morphological Anatomy and Some Physiological Characters of Floral Bud Differentiation in Bolting Garlic,S633.4
  10. Influence of Soil Magnistorage Compatibilizer on the Water Consumption Characteristic and Water Use Efficiency of Crops,S311
  11. The Influences of Tillage and Application of Microbial Inoculants on Soil Chemical and Biological Characteristics in Rotation of Wheat and Corn,S513;S154
  12. Study on Nitrogen Release Characteristic and Biological Effect of Modified Starch-coating-urea,TQ440.1
  13. Diagnosis of N Nutrient Status of Crop Using Digital Image Processing Technique,S512.11;S513
  14. Effects of Resin Coating Residue of Controlled-Release Fertilizers on Soil Physical and Chemical Properties and Growth of Crops,S145.6
  15. The Characteristics and Parameterization of Land Surface Processes and Its Relationship with Climate over Northern China,P461
  16. Study on Fish-scale Pits of Different Specification in Semi-arid Loess Plateau of Northern Shaanxi Province,S341.2
  17. Study on Vegetation Pattern and Structure of Goat Road Landscape in Semi-arid Loess Plateau,Q948
  18. Effects of Different Tillage Methods on Eco-physiological Characteristics Related with Photosynthesis of Spring Wheat in Semi-arid Area,S512.12
  19. Water and Nitrogen Dynamics in Soil and Crops Growth as Affected by Sprinkle Irrigation and Fertilization Management,S513
  20. Yield and Utilization of Water and Nitrogen for Winter Wheat/Summer Maize Affected by Nitrogen and Phosphorus on Dry-Land,S513
  21. Study on Post-harvest Physiology and Storage Character of Pears,S661.2

CLC: > Agricultural Sciences > Agriculture ( agronomy ) > Principles of Crop Biology, cultivation techniques and methods > Crop Physiology
© 2012 www.DissertationTopic.Net  Mobile