定位秸秆还田对土壤生产力的影响

论文总字数：18958字

目 录

摘要 1

ABSTRACT 2

引言 3

1 材料与方法 4

1.1研究区概况 4

1.2实验材料 4

1.3实验设计 4

1.4样品的采集与处理 4

1.5测定方法 4

1.6数据处理与分析 6

2 结果与分析 6

2.1定位秸秆还田对黑土速效N、速效K、速效P含量的影响 6

2.1.1 土壤碱解N 6

2.1.2土壤速效P 7

2.1.3土壤速效K 7

2.2定位秸秆还田对黑土全K、全P含量的影响 8

2.2.1土壤全P 8

2.2.2土壤全K 9

2.3定位秸秆还田对黑土土壤有机质含量的影响 10

2.4定位秸秆还田后土壤养分的年际变化规律 11

2.4.1定位秸秆还田后土壤碱解N、速效K、速效P年际变化规律 11

2.4.2定位秸秆还田后土壤全P、全K和有机质年际变化规律 11

2.5休闲处理与种植作物对秸秆还田后土壤养分的影响 12

2.6定位秸秆还田下黑土碱解氮含量的年际变化动态 12

3讨论 12

4 结论 13

参考文献： 14

致谢 17

定位秸秆还田对土壤生产力的影响

熊西江

, China)

ABSTRACT：[Objective]The purpose is to study the effects of straw returning on black soil nutrient and productivity. [Methods] The study was carried out at the Helen agricultural ecological experiment station of the Chinese Academy of Sciences, Helen, Heilongjiang, and the soil of the experimental field of the Helen agro ecological experimental station of the Chinese Academy of Sciences, Helen, Heilongjiang, 2012-2016 years was used as the material. 3 treatments were set up: control treatment, NPK conventional fertilization; straw returned to field, straw returned to field NPK conventional fertilization; leisure. Making determination of the content of soil alkaline solution N, available P, available K, total N, total P, organic matter. [Results] Straw incorporation could increase soil productivity in black soil in Northeast China. Compared with the control group, the content of alkali hydrolyzed N in black soil increased by 2.00%-8.55%, the content of available P increased 47.28%-58.18%, the content of available K increased 22.65%-33.23%, the content of P increased 15.15%-44.94%, the content of all K increased 2.32%-35.84%, and the content of organic matter increased 1.69%-57.69%. The effect of leisure can increase soil nutrient content and the effect on potassium content is more obvious than straw returning (planting crop), compared to the control soil effective K content increased 17.12%-56.19%, the total K content increased by 30.46% - 71.19%, so the use of leisure to maintain high potassium levels of the soil in this area. [Conclusion] In the northeast black soil area, the soil can be treated for a period of time, using the method of locating straw in the field, adding a small amount of phosphate fertilizer and nitrogen fertilizer, changing the heat of soil water, fertilizer and gas to the maximum extent, improving the productivity of the black soil and raising the crop yield.

Key words: Straw returning; Black soil; Organic matter; Soil fertility

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