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Study on Water-Holding Capacity and Application Technology of Hong Sen Superabsorbent in Mountainous Jujube Orchard

Author: SongHaiYan
Tutor: WangYouKe
School: Northwest University of Science and Technology
Course: Soil and Water Conservation and Desertification Combating
Keywords: superabsorbent maize water-holding capacity jujube soil water content soil fertility
CLC: S482.99
Type: Master's thesis
Year: 2009
Downloads: 52
Quote: 1
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Abstract


According to present situation of water resources is increasingly strained and low utilization rate of rainwater and irrigation water in North Shaanxi Province. Study new and lower cost superabsorbent is the important approach to develop water saving, high efficient, standing modern agriculture, and to utilize farmland precipitation resource more efficiently. Through the inside and field test, this paper is research on the inflection on crop and soil with superabsorbent , and obtained reasonable amount and suitable application methods of Hong Sen superabsorbent. All of that are the theory and technology values for the vast area application.The conclusion is that:(1) Potted plant test indicate: Survival time of maize were longer when the amount of superabsorbent were higher, Survival time of maize of both 0.2% and 0.3% treatments 3 days longer compare with the control treatment; Integrated analysis indicate that the ratio of Superabsorbent and Loessal Soil 1:300～1:500 achieved remarkable effect in the experiment.(2) The influence of suberbent on soil water in jujube woods is quite obviously. Superabsorbent were beneficial to accumulate more water (natural rainfall and irrigation water), And water absorption is associated with the amount of superment, Soil water content would be higher when increasing the amount of superabsorbent.(3) The change of nitrate N under application of superabsorbent, Nitrate N content more higher in 40-60cm (application of superabsorbent) layers, and when amount of superabsorbent increased, Nitrate N content increased significantly. Nitrate N content of CK more higher than other treatments in 60-80cm layers. Application of superabsorbent can decrease leaching loss of nitrate N. Available P content after growth period of jujube in all treatments showed similar changes to CK. compared with before growth period of jujube, Higher content of available P content in 0-40cm layers, and content changed little other layers.(4)The influence on root collar diameter, leaf area and leaf chlorophyl content of jujube in the whole growth time is quite obviously. it can increase leaf relative water content in fruit expanding periods obviously, the shedding shoot length of jujube in the whole growth of all treatments with superabsorbent are all higher than CK 6.8%、12.8%、17%、25.8%、40.6%, direct application of superabsorbent and application after absorbing water are higher than CK13.9%和25.8%.(5) Superabsorbent can increase yield of jujube, and yield would be higher when increasing the amount of superabsorbent, yields of jujube of application of superabsorbent 30, 60, 90, 120 and 150 g are higher than CK 3.59%、13.07%、32.90%、57.57% and 73.17%. Yield of jujube of direct application of superabsorbent and application after absorbing water are higher than CK 29.91% and 40.85%.

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