Organic manure stimulates biological activity and barley growth in soil subject to secondary salinization
Organic manure stimulates biological activity and barley growth in soil subject to secondary salinization
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DOI：
10.1016/j.soilbio.2004.11.017
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发表时间：
2005-06-01
影响因子：
9.7
通讯作者：
Jiang, Y
中科院分区：
文献类型：
--
作者：
Liang, YC;Si, J;Jiang, Y
通过盆栽试验，比较了有机肥对土壤酶活性、呼吸速率及两个大麦品种生长的影响。在模拟盐渍化环境下，它们的耐盐性不同。在底部中心有孔（直径2 cm）的塑料盆中填充人为（水稻）土壤，并放置在含有NaCl溶液（3.0 g L-1）的瓷容器中，使得通过沿土壤剖面沿着向上的毛细水运动来模拟次生盐渍化过程。以不施有机肥和模拟土壤盐渍化处理为对照（CK 1）。将有机肥料施于由尼龙布制成的根瘤袋（孔径为40 μ m）的内部或外部。土壤处理为：稻草20 g kg（-1），猪粪20 g kg（-1），稻草10 g kg（-1）+猪粪10 g kg（-1）。在另一个对照处理（CK 2）中不添加有机肥。结果表明，有机肥袋内和袋外施入均显著提高了根际和非根际土壤的脲酶、碱性磷酸酶和脱氢酶活性以及呼吸速率。此外，在根瘤菌内或外添加有机肥的处理中，大麦植株对养分的吸收也得到了增强。根际土壤中这些酶的活性沿着呼吸速率的变化，根际土壤中有机肥施用量高于非根际土壤，而根际土壤中有机肥施用量高于非根际土壤。在所有处理中，RS + PM处理对大麦酶活性、微生物活性和地上部干重的促进作用最显著，其次是PM和RS。此外，在根瘤菌内施用有机肥比在根瘤菌外施用有机肥对土壤酶活性和植株生长的促进作用更显著。本研究的结果证实了这样的观点，有机肥，特别是在土壤根区是一个有效的低投入的农业技术途径，以提高土壤肥力和减少次生盐渍化引起的植物毒性。(c)2005爱思唯尔有限公司保留所有权利。
A pot experiment was performed to compare the impact of organic manure on soil enzymatic activity, respiration rate and the growth of two barley cultivars (Hordeum vulgare L.) differing in their salt tolerance under a simulated salinized environment. A plastic pot with a hole (2 cm in diameter) in the center of bottom was filled with an anthropogenic (paddy) soil and placed in a porcelain container containing NaCl solution (3.0 g L-1) such that a secondary salinization process was simulated via upward capillary water movement along the soil profile. A treatment with neither organic manure nor simulated soil salinization was taken as a control (CK1). The organic manure was applied either inside or outside rhizobag made of nylon cloth (40 mu m of pore size). The soil was treated with: 20 g kg(-1) rice straw (RS), 20 g kg(-1) pig manure (PM), or 10 g kg(-1) rice straw plus 10 g kg(-1) pig manure (RS + PM). No organic manure was added in an additional control treatment (CK2). The results indicated that the placement of organic manure both inside and outside rihzobags significantly increased the activity of urease, alkaline phosphatase and dehydrogenase, as well as respiration rate in both rhizosphere and bulk soils. Also, nutrient uptake by barley plants was enhanced in the treatments with organic manure amended either inside or outside rhizobags. The activity of these enzymes along with the respiration rate was higher in rhizosphere than in non-rhizosphere when organic manure was supplied inside rhizobags, while the opposite was found in the case of manure incorporated outside rhizobags. Among all the treatments, RS + PM treatment had most significant stimulating effects on enzymatic and microbial activity and shoot dry weight of barley, followed by PM and RS. Moreover, more significant stimulating effects on both enzyme activity and plant growth were achieved in the treatments with manure amended inside rhizobags than outside rhizobags. The results of the present study confirmed the view that incorporation of organic manure especially into soil-root zones is an effective low-input agro-technological approach to enhancing soil fertility and minimizing phytotoxicity induced by secondary salinization. (c) 2005 Elsevier Ltd. All rights reserved.