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Study on Water and Fertilizer Coupling Pattern of Drip Irrigation Soybean in the Western Semi-arid Area of Heilongjiang Province

Author: FengShuMei
Tutor: ZhangZhongXue
School: Northeast Agricultural University
Course: Agricultural Soil and Water Engineering
Keywords: Semiarid area of western Heilongjiang Province Soybean Drip Irrigation Fertilizer coupling
CLC: S565.1
Type: Master's thesis
Year: 2011
Downloads: 62
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Abstract


Fertilizer investment in the agricultural production of the two main factors , two important technical measures is also human control . Semiarid Area of ??Western Heilongjiang Province, the huge potential for agricultural production , but insufficient water resources and the uneven distribution of the region 's agricultural production constraints , unreasonable fertilization is the main reason to limit water potential . This article explored through field trials , under drip irrigation , fertilizer coupling on soybean yield, biological traits of field soil moisture dynamics , establishing soybean yield under drip irrigation water nitrogen coupling effect equation to explore applies to this optimize water conservation fertilization mode region . The test results show that : ( 1 ) The field trials showed that both yield effect on soybean yield , nitrogen fertilizer and water affect the strength of the order : nitrogen main effect is greater than the main effect of the water , and that the level of nitrogen fertilizer per unit area Adding the increased soybean yield greater than the increase in soybean production increased irrigation amount per unit area . (2) the production effects regression equation shows that the the nitrogen water interaction X1X2 coefficient is positive, mutual promotion nitrogen and water coupling on the increase in production . ( 3 ) application of simulation optimization analysis was that , under the test conditions soy ≥ 2223 kg / hm ~ 2 yields , fertilizer and drip irrigation with the optimal combination of range : phosphate fertilizer dosage of 90 kg / hm ~ 2 and potash dosage of 75 kg / hm ~ 2 , the amount of nitrogen fertilizer 85.53-105.95 kg / hm ~~ drip irrigation water of of 1085.31-1229.00 m3/hm to 2 . (4 ) water and fertilizer on soybean yield components of leaf area index , plant height , stem diameter , dry matter accumulation , harvest index , pod growth have different degrees of coupling . (5 ) under field conditions , water consumption and yield in crop affected by many factors , and thus crop yields , not simple linear relationship between water consumption and water use efficiency .

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CLC: > Agricultural Sciences > Crop > Economic crops > Oil crops > Soybean
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