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首页> 外文期刊>HortScience >Plant density and nitrogen fertilizer rate on yield and nutrient content of onion developed from greenhouse-grown transplants
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Plant density and nitrogen fertilizer rate on yield and nutrient content of onion developed from greenhouse-grown transplants

机译：温室种植移栽植物的密度和氮肥用量对洋葱产量和养分含量的影响

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摘要

Onions (Allium cepa L.) can be established from seed or transplants. The latter planting material can be dormant or actively growing when transplanted to the field. Onion transplants can be produced in a greenhouse, but additional information is needed regarding the cultural requirements after transplanting. Greenhouse-grown transplants of 'Candy', intermediate-day variety, and 'Texas Grano 1015 Y', short-day variety, were established at densities of approximate to 34,000, 68,000, or 102,000 plants/ha and 100 (recommended) and 400 kg.ha(-1) of nitrogen in mid-March of 2006 and 2007. Nitrogen fertilizer rate did not affect yield. Yield of 'Candy' was greater than for 'Texas Grano 1015 Y'. Yield of both cultivars increased as density increased, and yield of 'Texas Grano 1015 Y' was higher in 2006 than in 2007. 'Candy' had higher numbers of large-sized bulbs and 'Texas Grano 1015 Y' more small bulbs. Bulb nutrient content was affected by year with nitrate-N, potassium, sodium, and SO4 being higher in 2006 and nitrite-N, calcium, magnesium, PO4, and soluble solids higher in 2007. 'Candy' had a higher soluble solids (degrees Brix) content than did 'Texas Grano 1015 Y'. In 2007, precipitation was higher than in 2006. This may have contributed to the year response and it appears that 'Candy' was better able to respond in a more uniform manner to the changed environmental conditions. For plants developed from greenhouse-grown transplants, the recommended rate of fertilizer and the highest plant density are beneficial to improved marketable yield.
机译：洋葱（葱属洋葱）可以从种子或移植物中建立。后者的种植材料在移植到田间时可以处于休眠状态或活跃生长。洋葱移植可以在温室中进行，但是需要有关移植后文化要求的其他信息。温室栽培的“ Candy”（中间日品种）和“ Texas Grano 1015 Y”（短日品种）的种植密度大约为34,000、68,​​000或102,000植物/公顷，以及100（推荐）和400 2006年和2007年3月中旬的氮素kg.ha（-1）。氮肥施用量没有影响产量。 “ Candy”的产量大于“ Texas Grano 1015 Y”的产量。两个品种的产量都随密度的增加而增加，2006年“ Texas Grano 1015 Y”的产量高于2007年。“ Candy”的大型鳞茎数量更多，“ Texas Grano 1015 Y”的小型鳞茎数量更多。灯泡养分含量受年份影响，2006年硝酸盐-N，钾，钠和SO4含量较高，2007年硝酸盐-N，钙，镁，PO4和可溶性固体含量较高。“糖果”的可溶性固体含量较高（度白利糖度）含量要比“德州格兰诺1015 Y”高。 2007年的降水量高于2006年。这可能是对年份的响应，“糖果”似乎能够更好地对变化的环境条件做出更统一的响应。对于使用温室种植的移植物开发的植物，推荐的肥料用量和最高的植物密度有利于提高可销售的产量。

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