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Study on Water Consumption and Crop Yield of the Wulnut Tree under Drip Irrigation Condition

Author: ZhengBing
Tutor: MaYingJie
School: Xinjiang Agricultural University
Course: Agricultural Soil and Water Engineering
Keywords: Walnut tree Drip Irrigation Water law Yield
CLC: S664.1
Type: Master's thesis
Year: 2011
Downloads: 41
Quote: 0
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Abstract


In this paper, on the basis of relevant literature data combined Tarim Basin features fruit trees, micro-irrigation technology research and demonstration of the national scientific and technological support projects, through field trials, woody grain and oil tree farms to Wensu County of Aksu Prefecture, 11 year-old walnut tree for research object, the different the irrigation quota residential kernel Peachtree whole growth period of water consumption regularity under drip irrigation, soil moisture changes, physiological indicators and crop yield effect, the results show that: (1) different drip irrigation throughout the growing period of the walnut tree the irrigation quota deal with the variation of the average soil moisture content is basically the same, decreased average soil moisture from largest to smallest sequentially arranged: Processing 4 gt; treatment 5 gt; handle 3 gt; processing 2 gt; treatment 1. Each treatment in different growth period of soil moisture with depth trend showed a decreasing trend with the growth period, the size of the soil moisture descending order: infancy gt; flowering Phase gt; fruit enlargement period gt; hard core The oil into Period gt; maturity. (2) drip irrigation water consumption of the walnut tree with the variation of the growth period: its water consumption gradually increases as the process moves forward growth period and reaches a maximum in the hard core and grease conversion period, followed by the maturity and becomes minimum. The strong correlation of drip irrigation, the water consumption of the walnut tree irrigation amount, water consumption was stepped growth with increasing irrigation amount, water consumption for each treatment from largest to smallest sequentially arranged: Handling 5 gt; processing 4 gt ; for 3 gt; processing 2 gt; treatment 1, the corresponding magnitude of water: 901mm, 880mm, 830mm, 734mm and 627mm. The crop coefficient Kc values ??drip irrigation walnut tree with the variation of the reproductive stage: the growth of early small-, medium-large, late smaller. Processing crop coefficient Kc value from largest to smallest sequentially arranged: processing 4,5 gt; handle 3 gt; processing 2 gt; processing 1. (3) different irrigation quota under drip irrigation has a certain effect on physiological indicators of the walnut tree. With the increase in irrigation amount each treatment walnut tree fruit aspect diameter, relative humidity, transpiration rate corresponding show an increasing trend, no significant differences in chlorophyll content and leaf temperature diurnal variation. Basically the same each day processing walnut leaves water potential trend showed a concave parabolic form of the leaf water potential from largest to smallest sequentially arranged: processing 4 ≈ processing 3 gt; treatment 5 gt; processing 2 gt; processing 1. Different irrigation treatments walnut tree the same diurnal variation, showed a trend of \handle 2 gt; processing 1. (4) different irrigation treatments walnut fruit in terms of fruit size, single kernel weight, kernel rate or protein content and fat content had no significant difference. Drip irrigation walnut tree not irrigation amount is more, the higher the yield, to some extent, the production will be increased with the increase in the amount of irrigation, irrigation amount exceeds a certain value, the walnut production did not improve the contrary may also reduce yields, production of each treatment arranged in descending order: treatment 3 gt; treatment 4 gt; treatment 5 gt; processing 2 gt; processing 1. Various irrigation treatments water use efficiency and irrigation water use efficiency are arranged in descending order are: Process 1 gt; processing of 2 ≈ processing gt; treatment 4 gt; processing 5. (5) five irrigation treatments comprehensive evaluation results are arranged in order from largest to smallest: Process 3 gt; processing 2 gt; processing 1 gt; treatment 4 gt; treatment 5 shows that 3 settings irrigation comprehensive evaluation of the program optimal efficiency, so this the drip irrigation walnut irrigation program more suitable for promotion in the actual production of the Aksu Prefecture, Xinjiang.

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CLC: > Agricultural Sciences > Gardening > Fruit trees gardening > Nuts (shell fruit ) > Walnut ( Juglans )
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