Dissertation > Excellent graduate degree dissertation topics show

Study on the Effect of Application Phosphate to Cotton-Field Soil Phosphorus Available

Author: LiuYongGang
Tutor: ShengJianDong
School: Xinjiang Agricultural University
Course: Soil
Keywords: Available phosphorus Total phosphorus phosphorus fertilizer Cotton-Field Soil
CLC: S562
Type: Master's thesis
Year: 2009
Downloads: 130
Quote: 0
Read: Download Dissertation

Abstract


In order to increase the utilization efficiency of soil phosphorus at the cotton fields in Xinjiang, the activation of phosphorus in the soil, reduce fertilizer usage, apply fertilizer to provide a theories basis for cotton-field in Xinjiang, choice three different soil texture in northern Xinjing, through field experiment and pilot experiment study different levels phosphorus fertilizer applied after the soil the changes of soil phosphorus, different types of phosphorus fertilizer effects. The main results are as follows:1. Pot experimentTo different Soil texture applied phosphorus can significant increase soil available phosphorus content, but different amount of phosphorus can significant increase soil available phosphorus only in the short time . with time prolong, applied phosphorus fertilizer only more than 300 kg/hm~2 can significant increase soil available phosphorus content. Each different amount of applied phosphorus soil available phosphorus content were no significant differences, more applied phosphorus the soil available phosphorus more decline. The fertilizer effect same to applied fertilizer 300 kg/hm~2 and more. Applied phosphorus to the three texture increase the effectiveness of available phosphorus showed that general level of applied phosphorus of soil available phosphorus largest increase at the Fine sand loamy soil, the lowest increase is Fine sand clay soil . High level of applied phosphorus to three texture soil available phosphorus increase same. ultra-high levels of applied phosphorus of soil available phosphorus largest increase at the Fine sand clay loamy , the lowest increase is Fine sand clay loamy.2.Field experiment(1)Applied phosphate to soil available phosphorus and total phosphorus effect Applied phosphorus fertilizer can increase the soil available in fine sand loamy soil and fine sand clay loamy soil , but the low level applied phosphorus fertilizer (below 300 kg/hm~2) not to be able obviously to increase the soil available phosphorus, high level applied phosphorus fertilizer (above 600 kg/hm~2) can only obviously increases the soil available phosphorus content in the cotton birth earlier period (seedling stage and flower bud time), later period (flowered bell time, boll opening time) the soil available phosphorus content no difference to applied phosphorous fertilizer and not only the most level can increase the soil available phosphorus content in the cotton growth season .Applied phosphorus fertilizer 150-600 kg/hm~2 soil available phosphorus no difference. So in the cotton field phosphorus. fertilizer should keep the level 150-300 kg/hm~2.Applied phosphorus fertilizer can increase the soil total phosphorus content but not significant. excessive applied phosphorus fertilizer can not significant increase soil total phosphorus content.(2)Different phosphate fertilizer to soil available phosphorus and total phosphorus effectThe soil available phosphorus no significant difference to fertilizer DAP and TSP applied level at 150 kg/hm~2, phosphorus fertilizer level at 300 kg/hm~2 in the cotton seedling-stage and budded-stage the soil of application TSP significantly more than DAP at soil available phosphorus. Applied phosphorus effect TSP than DAP.(3) Effects of Phosphate Fertilizer To the Cotton yieldApplied phosphorous fertilizer can significant increase cotton yield, high and low of fertilizer application levels small effect to cotton yield. Applied phosphorous fertilizer at cotton fields should control 150 kg/hm~2-300 kg/hm~2 from cotton yield and costs. The soil of application TSP more than DAP at cotton yield but no significant difference..

Related Dissertations

  1. The Research about the Main Factors Which Effect on the Eluviation of Heavy Metals in the Soil,X53
  2. Effects of Fertilization on Absorption and Distribution of Cu, B, Mo in Different Potato Varieties,S532
  3. Studies on the Uptake, Accumulation and Distribution of Mn, Zn and Fertilization Effects in Different Potato Cultivars,S532
  4. Effects of Combined Apllication of Nitrogen, Phosphorus and Potassium on the Yield and Quality of Marigold,S682.11
  5. Studies on Mechanism of Nitrogen and Phosphorus on Isoflavones Contents in Red Clover (Trifolium Pratense) and Anti-oxidant Performance of Isoflavones,S541.2
  6. Study on the Nutrition Diagnosis Index of Phosphorus Applied to Hybrid Cotton,S562
  7. Study on Phosphorus Nutritional Physiology of Cymbidium Hybridum,S682.31
  8. Effects of Irrigation and Phosphorus Fertilizer on Water Consumption Characteristics and Grain Yield and Its Physiological Basis in Wheat,S512.1
  9. The Effect of Combined Application of Nitrogen and Phosphorus on Yield and Physiology on the Winter Wheat & Summer Maize in the Drought Region,S513
  10. The Studies on Transformation、Influence Factors and Availability of Phosphorus Fertilizer in Vegetable Soil,S158
  11. Effects of Nitrogen and Phosphorus on Grain Starch Accumulation and Its Relationships to Grain Quality in Spring Wheat Differing in HMW-GS Composition,S512.12
  12. Effect of phosphorus on soil phosphorus Behavior Research,S158
  13. Studies on Applying Fertilizer Technique in Cotton with the Drip Irrigation under Mulch in ShiHezi,S562
  14. The Response of Yield of Vegetable to Phosphorus Fertilizer, the Motion of Phosphorus Fertilizer in Soil,S143.2
  15. Effects of Density and P Fertilizer on Growing and Yielding Characters as Well as Quality of Panicum Miliacum L.,S516
  16. Effects of Levels of Energy and Available Phosphorus in the Broiler Diets on Efficacy of Phytase,S831.5
  17. Clonal Growth of Hippophae Rhamnoides L.ssp. Sinensis in Response to Fertilization of Nitrogen in Combination with Phosphorus in Mu Us Sandland,S793.6
  18. Studies on the Change of Phytic Acid Accumulation and Its Response to Environmental Factors in Barley Grains,S512.3
  19. Genetic Dissection of Important Agronomic Traits in Brassica Rapa,S330
  20. Phosphorus Management in Chinese Agroecosystem Based on Forecasting the Change of Soil Phosphorus Fertility,S158
  21. Phosphorus Management in Chinese Agroecosystem Based on GIS and Outlook of Phosphate Fertilizer Demand,S158

CLC: > Agricultural Sciences > Crop > Economic crops > Fiber crops > Cotton
© 2012 www.DissertationTopic.Net  Mobile