秸秆隔层结合春灌对河套灌区盐碱地土壤呼吸及其温度敏感性的影响

doi:10.3864/j.issn.0578-1752.2023.12.009

Abstract

Abstract:

【Objective】This study was conducted to explore the responses of saline-alkali soil respiration to straw interlayer and irrigation regime, and to clarify the relationships between soil respiration rate and soil temperature/water content in Hetao Irrigation District. 【Method】A randomized block design was set up in 2015 with three treatments: autumn and spring irrigation (I_SA), spring irrigation without autumn irrigation (I_S), and spring irrigation plus straw interlayer without autumn irrigation (SI_S). Soil respiration, soil temperature and moisture content were measured in 2017 and 2018, and the temperature sensitivity of soil respiration rate was also estimated. 【Result】(1) Soil temperature and soil moisture content in the 0-20 cm soil layer fluctuated obviously, while it was relatively stable in the 20-40 cm soil layer. SI_S increased the soil temperature in 0-40 cm soil depth and moisture content in 20-40 cm soil depth. (2) The soil respiration rate in 2017 was higher than that in 2018. It was the highest in the flowering stage, followed by budding stage, before spring irrigation, before sowing, and harvest stage. (3) The soil respiration rates of I_S and SI_S were significantly higher than I_SA at the flowering stage (P<0.05). Compared with I_SA, I_S and SI_S increased soil respiration rate by 0.12-0.44 and 0.06-0.42 μmol·m^-2·s^-1, respectively. Compared with the I_S, the soil respiration rate of SI_S decreased by 0.01-0.49 μmol·m^-2·s^-1. These results indicated that the soil respiration rate was increased without autumn irrigation, while it was decreased with straw interlayer. (4) The soil respiration rate positively correlated with soil temperature (P<0.01), while it had no significant correlation with soil moisture content. Soil temperature at the 0-20 and 20-40 cm soil layer explained 40.74%-53.84% and 39.27%-53.46% variation of soil respiration rate, respectively. (5) The temperature sensitivity of soil respiration (Q₁₀) varied within 1.68-1.98 for different treatments, and the Q₁₀ of the 20-40 cm soil depth was higher than that of the 0-20 cm soil depth. Compared with I_SA, I_S and SI_S reduced Q₁₀. However, SI_S increased Q₁₀ compared with I_S. 【Conclusion】Overall, the straw interlayer increased the soil temperature in 0-40 cm soil depth and moisture content in 20-40 cm soil depth, reduced soil respiration rate, and increased the temperature sensitivity of soil respiration, which was used as an effective practice for water saving and emission reduction in the Hetao Irrigation District.

Key words: Hetao Irrigation District, saline-alkali soil, straw interlayer, irrigation regime, soil respiration rate, soil moisture content, temperature sensitivity

YU Ru, SONG JiaShen, ZHANG HongYuan, CHANG FangDi, WANG YongQing, WANG XiQuan, WANG Jing, WANG WeiNi, LI YuYi. Effects of Straw Interlayer Combined with Spring Irrigation on Saline- Alkali Soil Respiration and Its Temperature Sensitivity in Hetao Irrigation District[J].Scientia Agricultura Sinica, 2023, 56(12): 2341-2353.

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References 41

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土层 Soil depth (cm)	土壤机械组成 Soil mechanical composition			容重 Bulk density (g·cm^-3)	有机质 Organic matter (g·kg^-1)	碱解氮 Available N (mg·kg^-1)	速效磷 Available P (mg·kg^-1)	速效钾 Available K (mg·kg^-1)
土层 Soil depth (cm)	砂粒 Sandy (%)	粉粒 Silt (%)	黏粒 Clay (%)	容重 Bulk density (g·cm^-3)	有机质 Organic matter (g·kg^-1)	碱解氮 Available N (mg·kg^-1)	速效磷 Available P (mg·kg^-1)	速效钾 Available K (mg·kg^-1)
0-20	34.92	52.84	12.24	1.46	10.85	33.77	4.20	138.21
20-40	36.80	54.42	8.78	1.48	7.58	30.01	0.96	89.31

年份 Year	春灌 Spring irrigation	土壤呼吸速率测定Measurement of soil respiration rate					秋浇 Autumn irrigation
年份 Year	春灌 Spring irrigation	春灌前 Before spring irrigation	播种前 Before sowing	现蕾期 Budding stage	开花期 Flowering stage	收获期 Harvest stage	秋浇 Autumn irrigation
2017	5.24	5.23	5.31	6.29	7.27	9.21	10.20
2018	5.13	5.12	5.25	7.26	8.16	10.5	10.23

	生育期 Stage (S)	年份 Year (Y)	处理 Treatment (T)	S×Y	S×T	Y×T	Y×S×T
土壤呼吸速率 Soil respiration rate	***	***	***	***	ns	ns	ns
0-20 cm土层温度 Soil temperature in 0-20 cm soil depth	***	***	***	***	***	***	***
20-40 cm土层温度 Soil temperature in 20-40 cm soil depth	***	***	***	***	***	***	***
0-20 cm土层含水量 Soil moisture content in 0-20 cm soil depth	***	***	*	***	***	***	***
20-40 cm土层含水量 Soil moisture content in 20-40 cm soil depth	***	ns	***	***	***	***	***

Effects of Straw Interlayer Combined with Spring Irrigation on Saline- Alkali Soil Respiration and Its Temperature Sensitivity in Hetao Irrigation District

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土层 Soil layer (cm)	处理Treatment
土层 Soil layer (cm)	I_SA	I_S	SI_S
0-20	1.86	1.68	1.77
20-40	1.98	1.84	1.85

[1]	REN JunBo,YANG XueLi,CHEN Ping,DU Qing,PENG XiHong,ZHENG BenChuan,YONG TaiWen,YANG WenYu. Effects of Interspecific Distances on Soil Physicochemical Properties and Root Spatial Distribution of Maize-Soybean Relay Strip Intercropping System [J]. Scientia Agricultura Sinica, 2022, 55(10): 1903-1916.
[2]	CAO HanBing,XIE JunYu,LIU Fei,GAO JianYong,WANG ChuHan,WANG RenJie,XIE YingHe,LI TingLiang. Mineralization Characteristics of Soil Organic Carbon and Its Temperature Sensitivity in Wheat Field Under Film Mulching [J]. Scientia Agricultura Sinica, 2021, 54(21): 4611-4622.
[3]	WANG GuoLi,CHANG FangDi,ZHANG HongYuan,LU Chuang,SONG JiaShen,WANG Jing,PANG HuanCheng,LI YuYi. Effects of Straw Interlayer with Different Thickness on Saline-Alkali Soil Temperature, Water Content, and Sunflower Yield in Hetao Irrigation Area [J]. Scientia Agricultura Sinica, 2021, 54(19): 4155-4168.
[4]	CHEN ErYing, QIN Ling, YANG YanBing, LI FeiFei, WANG RunFeng, ZHANG HuaWen, WANG HaiLian, LIU Bin, KONG QingHua, GUAN YanAn. Variation and Comprehensive Evaluation of Salt and Alkali Tolerance of Different Foxtail Millet Cultivars Under Production Conditions [J]. Scientia Agricultura Sinica, 2019, 52(22): 4050-4065.
[5]	ZHANG XiaoLi,ZHANG HongYuan,LU Chuang,PANG HuanCheng,JIN CunWang,GAO Xi,CHENG AiPing,LI YuYi. Effects of the Different Autumn Irrigation Years on Soil Bacterial Community in Hetao Irrigation District [J]. Scientia Agricultura Sinica, 2019, 52(19): 3380-3392.
[6]	DU Bin, HU XiaoTao, WANG WenE, MA LiHua, ZHOU ShiWei. Stem Flow Influencing Factors Sensitivity Analysis and Stem Flow Model Applicability in Filling Stage of Alternate Furrow Irrigated Maize [J]. Scientia Agricultura Sinica, 2018, 51(2): 233-245.
[7]	ZHANG YanJun. Effect of Long-Term Fertilization on Temperature Sensitivity of Soil Respiration During Fallow Season [J]. Scientia Agricultura Sinica, 2017, 50(16): 3164-3174.
[8]	SUN Shi-kun, LIU Wen-yan, LIU jing, WANG Yu-bao, CHEN Di-yi, WU Pu-te. Sensitivity and Contribution Rate Analysis of the Influencing Factors of Spring Wheat Water Footprint in Hetao Irrigation District [J]. Scientia Agricultura Sinica, 2016, 49(14): 2751-2762.
[9]	ZHANG Su-yu, WANG He-zhou, YANG Ming-da, WANG Jing-li, HE De-xian. Influence of Returning Corn Stalks to Field Under Different Soil Moisture Contents on Root Growth and Water Use Efficiency of Wheat (Triticum aestivum L.) [J]. Scientia Agricultura Sinica, 2016, 49(13): 2484-2496.
[10]	ZHAO Li-ming, LI Ming, ZHENG Dian-feng, GU Chun-mei, NA Yong-guang, XIE Bao-sheng. Effects of Irrigation Regimes on Yield and Grain Filling of Rice (Oryza sativa L. ) in Cold Region [J]. Scientia Agricultura Sinica, 2015, 48(22): 4493-4506.
[11]	SUN Yong-Jian-1, MA Jun-1, SUN Yuan-Yuan-2, XU Hui-1, YAN Feng-Jun-1, DAI Zou-1, JIANG Ming-Jin-1, LI Yue-1. Effects of Water and Nitrogen Management Patterns on Population Quality and Yield of Hybrid Rice Gangyou 527 [J]. Scientia Agricultura Sinica, 2014, 47(10): 2047-2061.
[12]	LU Da-Lei, SUN Xu-Li, WANG Xin, YAN Fa-Bao, LU Wei-Ping. Effects of Water Stress During Grain Filling on Physicochemical Properties of Waxy Maize Flour [J]. Scientia Agricultura Sinica, 2013, 46(1): 30-36.
[13]	Hong-Hai LUO Jun-Hua LI Ling GOU Wang-Feng ZHANF Zai-Ju HE Xin-Jun YANG. Regulating Effects of Soil Moisture Content on Production and Distribution of Photosynthate and Yield of Cotton during Flowering and Boll-Setting Stage Under Mulch Drip Irrigation in Xinjiang [J]. Scientia Agricultura Sinica, 2008, 41(7): 1955-1962 .
[14]	ZHANG Shu-qin, XIE Cheng-tao . Study of Soil Improvement Salinity in the Past 50 Years [J]. Scientia Agricultura Sinica, 2007, 40(增刊): 3227-3236.
[15]	,,,,. Effects of Soil Moisture Content on the Mineralization of Added 14C-Labbelled Straw and Native Soil Organic Carbon in Upland Soil [J]. Scientia Agricultura Sinica, 2006, 39(03): 538-543 .