干旱区生态环境知识资源中心(Arid): 保水剂用量对矿区紫花苜蓿生长的影响

Arid

	保水剂用量对矿区紫花苜蓿生长的影响
其他题名	Effects of application rate of super absorbent polymers on the growth of Medicago sativa in mining area
	陈艺超; 孙保平; 张建锋; 宋双双; 李智勇; 陈串
来源期刊	中国水土保持科学
ISSN	2096-2673
出版年	2018
卷号	16 期号:4 页码:124-131
中文摘要	中国北方矿区生态环境脆弱、水土流失严重,植被恢复难度大。为得出矿区紫花苜蓿种植中保水剂的最佳用量,以矿区废弃地土壤为基质,研究6种质量分数的保水剂(0、0.15%、0.30% 、0.45% 、0.60%和0.90%)对紫花苜蓿存活时间、矿区土壤的土壤含水率、土壤养分及对紫花苜蓿生长状况(光合作用、叶绿素质量分数、生物量和根冠比)的影响。结果表明:施加保水剂能延长紫花苜蓿存活时间,增加土壤含水率,保蓄土壤养分,提高土壤养分质量分数,增强紫花苜蓿光合效率和水分利用效率,减少叶绿素破坏分解,使紫花苜蓿生物量增加。与对照相比,添加保水剂的处理紫花苜蓿存活时间延长6.16% ~ 35.05%,土壤含水率提高1.04% ~8.78%,土壤全氮、全磷和全钾质量分数分别提高13.40%~35.54%,2.61% ~ 18.93%和8.53% ~ 15.89%,速效氮、速效磷和速效钾质量分数提高5.88% ~47.02%,17.88% ~101.73%和12.5% ~ 31.55%。净光合速率、蒸腾速率、气孔导度、胞间CO_2浓度和水分利用效率分别增加8.94% ~ 96.96% 、5.64% ~ 61.12%、14.17% ~ 135.05%、14.85% ~ 49.71%和1.08% ~ 16.48%,叶绿素质量分数增加9.48% ~ 30.29% c紫花苜蓿生物量增加17.01% ~61.96%。综合各指标改良效果,以保水剂质量分数0.30% ~ 0.45%为矿区废弃地紫花苜蓿种植的适宜浓度。
英文摘要	[Background] The climate of mining areas in northern China is arid and rainless, and water is the main factor restricting the reconstruction of vegetation. Moreover, the ecological environment of mining area has been greatly destroyed during mining process, the soil erosion is aggravated, and the ecological restoration is more difficult. Medicago sativa is a common soil and water conservation plant in China, and super absorbent polymer (SAP) can effectively promote the restoration of vegetation and prevent soil erosion. Therefore, it is of great significance to study the effect of SAP on the growth of M. sativa in the arid mining area. [Methods] In order to obtain the optimal dosage of SAP in the planting of M. sativa in the arid mining area, pot culture method was used to grow M. sativa in the mining area soil, with 6 concentrations of SAP [0 (CK),0.15% (Al), 0.30% (A2), 0.45% (A3),0.60% (A4), and 0.90% (A5) J. During the growth period, the soil moisture content were measured with MPM 160B portable soil moisture meter, the net photosynthetic rate (P_n), transpiration rate (T_r), stomatal conductance (G_s), intercellular CO_2 concentration (C_i) were measured with plant photosynthetic system Li - 6400P, the leaf water use efficiency (WUE) was calculated, the chlorophyll content was measured by spectrophotometry method and the survival time of plants was measured. After the experiment, the whole plant was harvested,the dry weight of aboveground parts and roots were weighed,and biomass and root shoot ratio were calculated. The soil was sampled and organic matter as well as nutrient content was measured. [Results] The growth of plants with SAP was better than the contrast, the survival time prolonged by 6.16% - 35.05%,and the maximum appeared at A2 and A3. The application of SAP effectively improved the soil moisture and nutrient status, the soil moisture content increased with the increase of the concentration of SAP, the effect of A2,A3 and A4 treatment on soil nutrient improvement was better and the improvement of available nutrients were better than total nutrients. Compared with the contrast, the moisture content of soil increased 1.04% - 8.78%,the total N,total P and total K increased by 13.40% - 35.54%,2.61% ~18.93% and 8.53% - 15.89%,and the available N, available P and available K increased by 5.88% - 47.02%,17.88% - 101.73% and 12.5% -31.55%,respectively. The application of SAP improved the photosynthetic capacity of the plants, and the maximum value of each index appeared in the A2 treatment and decreased with the increase of the concentration of the SAP. P_n, T_r, G_s, C_i, and WUE increased by 8.94% - 96.96%,5.64% -61.12%, 14.17% - 135.05%, 14.85% -49.71% and 1.08% - 16.48%, respectively, the chlorophyll content increased by 9.48% - 30.29%. The biomass increased by 17.01 % - 61.96%,the maximum one occurred at A2 treatment, and decreased with the increase of the concentration of SAP. [Conclusions] The implementation of SAP may increase soil moisture content and preserve soil nutrient, enhance photosynthesis efficiency and water use efficiency of M. sativa, reduce decomposition of chlorophyll, increase biomass and prolong survival time. Considering the improvement effect of SAP on each index, the concentration of 0.30% -0.45% is the optimal concentration for M. sativa planting on mining wasteland.
中文关键词	紫花苜蓿 ; 矿区土壤 ; 植物生长 ; 保水剂
英文关键词	Medicago sativa mining soil plant growth super absorbent polymer
语种	中文
国家	中国
收录类别	CSCD
WOS类目	AGRICULTURE MULTIDISCIPLINARY
WOS研究方向	Agriculture
CSCD记录号	CSCD:6332321
来源机构	北京林业大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/238845
作者单位	北京林业大学水土保持学院, 北京 100083, 中国
推荐引用方式 GB/T 7714	陈艺超,孙保平,张建锋,等. 保水剂用量对矿区紫花苜蓿生长的影响[J]. 北京林业大学,2018,16(4):124-131.
APA	陈艺超,孙保平,张建锋,宋双双,李智勇,&陈串.(2018).保水剂用量对矿区紫花苜蓿生长的影响.中国水土保持科学,16(4),124-131.
MLA	陈艺超,et al."保水剂用量对矿区紫花苜蓿生长的影响".中国水土保持科学 16.4(2018):124-131.