Effects of dolomite and gypsum on weeds
Effects of dolomite and gypsum on weeds
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DOI：
10.1080/00103629109368517
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发表时间：
1991-09
影响因子：
1.8
通讯作者：
R. Stephenson;J. Rechcigl
中科院分区：
文献类型：
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作者：
R. Stephenson;J. Rechcigl
摘要美国大多数种植者都认为石灰是酸性土壤作物生产的重要组成部分。在沙质、硅质、高温 Ultic Hapliquod（波莫纳细沙）土壤上进行了温室和实地研究，以确定白云质石灰岩和石膏对杂草种群的影响。在温室条件下，添加白云石会增加土壤盆中的杂草数量。杂草生长的最佳条件是 pH 值 5.3 至 5.5。当 pH 值大于 5.5 时，杂草种群保持稳定或数量普遍减少。在田间条件下，在种植三种不同草种（星草、巴哈草和一年生黑麦草）之前施用白云石和石膏。添加白云石可以减少杂草数量，因为土壤 pH 值更有利于草的快速生长。当 pH 值接近 5.8 至 6.0 时，草类的竞争更为激烈，而当 pH 值在 4.8 至 4.9 时，杂草数量最多。这些研究结果表明，石灰...
Abstract Liming is recognized by most growers in the United States as an essential part of crop production on acid soils. Greenhouse and field studies were conducted on a sandy, siliceous, hyperthermic Ultic Hapliquod (Pomona fine sand) soil to determine the effects of dolomitic limestone and gypsum on weed populations. Under greenhouse conditions, addition of dolomite increased weed populations in pots of soil. Optimum conditions for weed growth occurred at pH 5.3 to 5.5. At pH levels greater than 5.5, weed populations were stable or showed a general decrease in number. Under field conditions, dolomite and gypsum were applied prior to plantings of three different grass species (stargrass, bahiagrass, and annual ryegrass). Addition of dolomite reduced weed populations because of a more favorable soil pH for rapid grass growth. Competition from the grasses was greater at a pH level near 5.8 to 6.0, whereas greatest weed numbers occurred at a pH of 4.8 to 4.9. Results of these studies indicate that liming i...