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美国大平原的小麦产量，即使在土壤有效钾供应充足的土壤也因施钾肥而得到提高。钾肥中含氯的成份可能是主要原因。本文通过大田试验研究氯对冬小麦的籽粒产量、植株含氮量、粒重、生长速度、叶病害和叶症状的影响。１９８８年设两个试点、两个品种（Ｒｅｄｗｉｎ、Ｃｒｅｅ）、五种Ｃｌ的用量（１０、２２、４５、９０、１３５ｋｇ／ｈｍ￣２）；１９９１－１９９２年设七个地点、六个品种（Ｒｅｄｗｉｎ、Ｃｒｅｅ、Ｗｅｓｔｏｎ、Ｍａｎｎｉｎｇ、ＱＴ５４２、Ｎｅｅｌｅｙ）、两种Ｃｌ用量（０、４５ｋｇ／ｈｍ￣２）试验。试验结果：七个对Ｃｌ肥效敏感地点平均增产２６７ｋｇ／ｈｍ￣２（７％）。不同品种间的产量受Ｃｌ影响的差异小，而不同试点的产量受Ｃｌ影响的差异大。分析植株的含氯量对判别Ｃｌ肥的产量响应地点（≤３．０ｇ，／ｋｇ）和非响应地点（＞３．０ｇ／ｋｇ）是有用的。增加Ｃｌ营养会促进小麦发育和增加未成熟粒重、加快籽粒充实期的籽粒生长速度。在八个试点，Ｃｌ肥增加成熟粒重达１７％。粒重是受Ｃｌ影响最大的产量因素。品种Ｒｅｄｗｉｎ和Ｍａｎｎｉｎｇ的生理叶斑；Ｗｅｓｔｏｎ和ＱＴ５４２的旗叶衰老、白粉病和叶锈病等都因施Ｃｌ肥而受抑制。这可能是施Ｃｌ增产的部?
The wheat yield in the Great Plains of the United States is also boosted by the application of potash, even in soils with sufficient available potassium. Chlorine in potash ingredients may be the main reason. In this paper, field experiments were conducted to study the effects of chlorine on grain yield, nitrogen content, grain weight, growth rate, leaf disease and leaf symptoms of winter wheat. Two pilot and two varieties (Redwin, Cree) and five kinds of Cl (10,22,45,90 and 135kg / hm ~ 2) were set up in 1988 and seven locations and six varieties Redwin, Cree, Weston, Manning, QT542, Neeley) and two doses of Cl (0,45 kg / hm ~ 2). Test results: The average production rate of seven fertilizer-sensitive sites for Cl was 267 kg / hm2 (7%). Differences in the effects of Cl on the yield of different cultivars were small, while the differences in the yields of different plots were greatly influenced by Cl. It is useful to analyze the chlorophyll content of plants to determine the location of yield response (≤ 3.0 g, / kg) and nonresponsive sites (> 3.0 g / kg) for Cl fertilizer. Increasing Cl nutrition will promote wheat development and increase immature grain weight, and accelerate the grain growth rate during grain filling. In eight trials, Cl fertilizer increased the weight of mature grains by 17%. Grain weight is the most affected yield factor by Cl. Varieties Redwin and Manning physiological leaf spot; Weston and QT542 flag leaf senescence, powdery mildew and leaf rust are all due to the application of Cl fertilizer and inhibited. This may be applied to the Ministry of Cl production?