干旱区生态环境知识资源中心(Arid): 柠檬酸对不同施肥处理灰漠土遗留磷的活化特征

Arid

	柠檬酸对不同施肥处理灰漠土遗留磷的活化特征
其他题名	Citric acid-mediated mobilization of legacy phosphorus in fertilized grey desert soil
	韩超群; 刘瑾; 杨建军; 李菊梅; 刘骅; 陈源泉; 隋鹏
来源期刊	中国生态农业学报（中英版）
ISSN	2096-6237
出版年	2020
卷号	28 期号:12 页码:1941-1948
中文摘要	明确土壤磷的活化潜力及释放特征是土壤遗留磷资源化利用的前提,以长期定位施肥的灰漠土为试验材料,选取不施肥(CK)、施氮磷钾化肥(NPK)、氮磷钾化肥与有机肥配施(NPKM)3种处理,以高浓度(10 mmol·L~(-1))和低浓度(2 mmol·L~(-1))柠檬酸对土壤遗留磷进行多次浸提,探究柠檬酸对长期不同施肥处理灰漠土遗留磷的活化潜力及特征。研究发现:不同施肥处理土壤遗留磷的活化总量为NPK>NPKM>CK,与土壤总磷含量变化一致;高、低浓度柠檬酸对供试灰漠土遗留磷的活化潜力基本相当(>80%)。供试土壤遗留磷的急剧释放伴随土壤pH的大幅下降,说明酸溶解是主要活化机制。高浓度柠檬酸活化整个阶段,NPK处理土壤磷的释放量均高于NPKM处理;而在低浓度柠檬酸处理前期,NPKM释放的磷量大于NPK,相关元素中仅与镁元素的释放一致,可见低浓度柠檬酸活化前期NPKM处理土壤磷的活化很可能来自镁磷。高浓度柠檬酸对灰漠土遗留磷的活化前期以无机Ca_8-P活化为主,后期以无机Ca_(10)-P活化为主。综上,柠檬酸可显著促进不同施肥处理灰漠土遗留磷的活化,鉴于灰漠土遗留磷的高活化潜力,可通过适当减量施肥及土壤磷高效利用管理等措施促进作物再利用。
英文摘要	Understanding soil phosphorus (P) characteristics and release potential is important for using the accumulated soil P (legacy-P).A long-term fertilization experiment in grey desert soil was performed to investigate the release potential and characteristics of soil legacy-P after mobilization with a low molecular-weight organic acid (i.e.,citric acid).Grey desert soil was untreated (CK),treated with commercial fertilization (NPK) or organic manure plus commercial fertilization combination (NPKM),and extracted with citric acid at high (10 mmol·L~(-1)) or low (2 mmol·L~(-1)) concentrations.The results showed that the legacy-P release potential differed among the variable fertilization treatments and was consistent with soil total P concentrations (NPK>NPKM>CK).The legacy-P release potentials after citric acid extraction were similar at high and low concentrations and made up more than 80% of the soil total P.Rapid soil P release was accompanied by a sharp decrease in soil pH,indicating that acid dissolution is the primary release mobilization mechanism.Under NPK treatment,the mobilized P was greater than that under NPKM from the beginning to the end of mobilization.NPKM released more P at the beginning of mobilization with low citric acid concentration,similar to soil magnesium.These results suggest that magnesium-associated P played a major role in P mobilization under NPKM treatment.The high citric acid concentration primarily mobilized the inorganic Ca_8-P pool,followed by the inorganic Ca_(10)-P pool.Citric acid significantly facilitated P mobilization in fertilized grey desert soil.The high release potential indicates that grey desert soil legacy-P can be accessed by reducing fertilization and efficient P management practices.
中文关键词	柠檬酸 ; 遗留磷 ; 活化潜力 ; 施肥方式 ; 灰漠土
英文关键词	Citric acid Legacy phosphorus Mobilization potential Fertilization pattern Grey desert soils
类型	Article
语种	中文
收录类别	CSCD
WOS类目	Agriculture
CSCD记录号	CSCD:6860719
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/354106
作者单位	韩超群, 中国农业大学农学院, 北京 100094, 中国. 刘瑾, 中国农业大学农学院, 北京 100094, 中国. 陈源泉, 中国农业大学农学院, 北京 100094, 中国. 隋鹏, 中国农业大学农学院, 北京 100094, 中国. 杨建军, 中国农业科学院农业环境与可持续发展研究所, 北京 100081, 中国. 李菊梅, 中国农业科学院农业资源与农业区划研究所, 北京 100081, 中国. 刘骅, 新疆农业科学院土壤肥料与农业节水研究所, 乌鲁木齐, 新疆 830091, 中国.
推荐引用方式 GB/T 7714	韩超群,刘瑾,杨建军,等. 柠檬酸对不同施肥处理灰漠土遗留磷的活化特征[J],2020,28(12):1941-1948.
APA	韩超群.,刘瑾.,杨建军.,李菊梅.,刘骅.,...&隋鹏.(2020).柠檬酸对不同施肥处理灰漠土遗留磷的活化特征.中国生态农业学报（中英版）,28(12),1941-1948.
MLA	韩超群,et al."柠檬酸对不同施肥处理灰漠土遗留磷的活化特征".中国生态农业学报（中英版） 28.12(2020):1941-1948.