有机改良剂对正常和盐碱地土壤磷组分及其转化的影响

IF 0.7 4区 农林科学 Q3 AGRICULTURE, MULTIDISCIPLINARY
M. Rashid
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引用次数: 3

摘要

土壤盐度导致生理干旱,阻碍了基本营养物质的生物利用。盐度和植物吸收磷之间的相互作用研究较少。进行了两个独立的培育实验,研究了不同有机改良剂施用对正常和受盐影响土壤中不同磷组分的分布和转化的影响。在第一个实验中,在三种不同土壤EC和SAR的土壤中施用三种不同水平的P(200、400和600 mg kg-1土壤)。在不同的时间间隔估计了土壤磷的不同组分(Ca2-P、Ca8-P、Al-P、Fe-P、Olsen-P)的变化。三种土壤磷在不同组分间的分布表现不同。在施用400 mg kg-1磷的PROKA土壤(盐碱地)中发现最大有效磷(12.18 mg kg-1)。在第二个实验中,使用各种有机改良剂[农家肥(FYM)、家禽粪便(PM)、作物残渣(CR)]和污水污泥(SS),在不同时间间隔添加和不添加400 mg kg-1的磷肥,以研究它们对土壤磷变化的影响。90天后,在所有土壤(正常、盐碱、边缘盐碱)中,添加FYM和PM改良剂后,植物有效Olsen-P含量显著增加,但添加CR和SS改良剂后则没有那么多。总的来说,在正常、盐碱和边缘盐碱土壤中,PM(23.2、21.7和19.4 mg kg-1)和FYM(20.6、17.6和20.6 mg kg-1)的Olsen-P增加量高于SS(14.3、15.5和15.7 mg kg-2)和CR(12.9、14.4和14.0 mg kg-)。在这些结果的基础上,得出结论,在正常和受盐影响的土壤中,将PM和FYM与400 mg kg-1的磷水平结合是调动更多可供植物吸收的磷的有效方法,其顺序为正常>盐碱>边缘盐碱。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
SOIL PHOSPHORUS FRACTIONS AND THEIR TRANSFORMATION IN NORMAL AND SALT AFFECTED SOILS AS AFFECTED BY ORGANIC AMENDMENTS
The soil salinity causes physiological drought resulting in hindrance in the bio-availability of essential nutrients. The interaction between salinity and phosphorus uptake by plants is less explored. Two independent incubation experiments were conducted to study the distribution and transformation of various P fractions in normal and salt affected soils as influenced by various organic amendments application. In first experiment, three different levels of P (200, 400 and 600 mg kg-1 of soil) were applied in three soils differing in soil EC and SAR. Changes in various fractions of soil P (Ca2-P, Ca8-P, Al-P, Fe-P, Olsen-P) were estimated at different time intervals. All three soils behaved differently for P distribution among various fractions. Maximum available P (12.18 mg kg-1 ) was found in PROKA soil (saline sodic) at 400 mg kg-1 of P applied. In 2nd experiment, various organic amendments [farmyard manure (FYM), poultry manure (PM), crop residue (CR)] and sewage sludge (SS) were used, with and without adding P fertilizer @ 400 mg kg-1 to study their effect on changes in soil P, at different time intervals. Plant available Olsen-P fraction significantly increased after 90 days in all soils (normal, saline sodic, marginal saline sodic) with amendments FYM and PM but not as much with amendments CR and SS. Overall, increase in Olsen-P was higher with PM (23.2, 21.7 and 19.4 mg kg-1) and FYM (20.6, 17.6 and 20.6 mg kg-1) as compared with SS (14.3, 15.5 and 15.7 mg kg-1) and CR (12.9, 14.4 and 14.0 mg kg-1) in normal, saline sodic and marginal saline sodic soils, respectively. On the basis of these results, it was concluded that integration of PM and FYM with P level 400 mg kg-1 is an effective approach to mobilize more P available for plant uptake in normal and salt-affected soils with order of normal> saline sodic> marginal saline sodic.
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来源期刊
Pakistan Journal of Agricultural Sciences
Pakistan Journal of Agricultural Sciences AGRICULTURE, MULTIDISCIPLINARY-
CiteScore
1.80
自引率
25.00%
发文量
18
审稿时长
6-12 weeks
期刊介绍: Pakistan Journal of Agricultural Sciences is published in English four times a year. The journal publishes original articles on all aspects of agriculture and allied fields.
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