Using <sup>15</sup>N to Reveal the Effects of Salt and Drought Stress on Soil Nitrogen Distribution and Cotton Growth in Drip Irrigation Areas

doi:10.13870/j.cnki.stbcxb.2021.06.044

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Using ¹⁵N to Reveal the Effects of Salt and Drought Stress on Soil Nitrogen Distribution and Cotton Growth in Drip Irrigation Areas

更新时间：2025-03-12

- Using ¹⁵N to Reveal the Effects of Salt and Drought Stress on Soil Nitrogen Distribution and Cotton Growth in Drip Irrigation Areas
- Vol. 35, Issue 6, Pages: 327-335(2021)
- 作者机构：
  
  石河子大学水利建筑工程学院新疆生产建设集团现代节水灌溉重点实验室,新疆,石河子,832003
- 作者简介：
- 基金信息：
- DOI：10.13870/j.cnki.stbcxb.2021.06.044
  CLC：
- Published：2021
- 稿件说明：
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Using ¹⁵N to Reveal the Effects of Salt and Drought Stress on Soil Nitrogen Distribution and Cotton Growth in Drip Irrigation Areas[J]. 2021, 35(6): 327-335.
DOI：

Using ¹⁵N to Reveal the Effects of Salt and Drought Stress on Soil Nitrogen Distribution and Cotton Growth in Drip Irrigation Areas[J]. 2021, 35(6): 327-335. DOI： 10.13870/j.cnki.stbcxb.2021.06.044.

摘要

为了探究盐旱胁迫对土壤中氮素分布和棉花生长的影响，通过测坑试验研究滴灌区不同盐分、干旱条件下土壤全氮、硝氮、氨氮的分布和棉花生长情况。试验设置3种盐分梯度的土壤（电导率，EC）：3，6，9 dS/m，分别用T1、T2、T3表示；3个灌水量：2 700，3 600，4 500 m

/hm

，分别用W1、W2、W3表示（4 500 m

/hm

为当地推荐灌水量）。结果表明：当土壤盐分梯度

3 dS/m时土壤全氮累积量显著高于低盐土壤（P

0.05），且土壤盐分对棉花花期生长影响较大。土壤的氨氮挥发量和土壤盐分梯度成正比。土壤硝态氮的淋失与灌水量呈正比，与正常灌水量的硝态氮淋失相比，水分胁迫对棉花产量的影响更为严重（P

0.01）。随土层深度的增加，土壤碱解氮以每20 cm土层8%的速度减少。各处理土壤

N残留率为11%~40%，随土壤盐度增加而增加，随灌水量增加而减少，与土壤全氮含量呈正比，与棉花产量呈反比。综上所述，T1W3处理更有利于棉花对氮肥的利用和产量的提高，推荐滴灌区棉花土壤盐度

3 dS/m，灌水量4 500 m

/hm

，可在花期适当提高施肥量以稳定产量。

Abstract

In order to explore the effects of salt and drought stress on the distribution of nitrogen in the soil and cotton growth

the distribution of total nitrogen

nitrate nitrogen and ammonia nitrogen in the soil and the growth of cotton under drought conditions under different salinity conditions in drip irrigation areas were studied through test pit tests. The experiment set up three water salinity levels with conductivity (EC) of 3 (T1)

6 (T2)

9 (T3) dS/m respectively

and three irrigation volumes of 2 700 (W1)

3 600 (W2)

4 500 (W3) m

/hm

resp

ectively (4 500 m

/hm

was the local recommended irrigation amount). The results showed that when the soil salinity was greater than 3 dS/m

the total soil nitrogen accumulation was significantly higher than the lower salinity (P

0.05)

and soil salinity had a greater impact on the growth of cotton during flowering. In addition

the volatilization of ammonia nitrogen in the soil was directly proportional to the soil salinity gradient. The leaching loss of soil nitrate nitrogen was proportional to the amount of irrigation water. Compared with the nitrate nitrogen leaching loss of normal irrigation amount

the impact of water stress on cotton yield was more serious (P

0.01). As the depth of the soil layer increased

the soil alkaline nitrogen decreased at a rate of 8% per 20 cm soil layer. The

N residue rate in the soil of each treatment was 11%~40%

which increased with the increase of soil salinity

and decreased with the increase of irrigation amount

which was proportional to the total nitrogen content of the soil and was inversely proportional to the cotton yield. To sum up

T1W3 was more conducive to the utilization of nitrogen fertilizer in cotton and the improvement of yield. It is recommended that the soil salinity of cotton in the drip irrigation area should be less than 3 dS/m

and the irrigation volume be 4 500 m

/hm

. The amount of fertilization could be appropriately increased during the flowering period to stabilize the yield.

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⁰

Using 15N to Reveal the Effects of Salt and Drought Stress on Soil Nitrogen Distribution and Cotton Growth in Drip Irrigation Areas

DOI：10.13870/j.cnki.stbcxb.2021.06.044

摘要

Abstract

关键词

Keywords

references

Using ¹⁵N to Reveal the Effects of Salt and Drought Stress on Soil Nitrogen Distribution and Cotton Growth in Drip Irrigation Areas