美国得克萨斯州等地区的农场,试验棉花密植,获得较高产量,并显著缩短生长期。据称,将每亩棉株数由传统的2,500—12,000株增至33,000—50,000株,行距由传统的81—107厘米减为13—25厘米,产量增加10—30%。棉花生长期由通常的175—225天缩短为135天。若干农场获得每亩107—114斤皮棉的产量。据试验称,密植棉田中,棉株比较短小,分枝少,花少,结桃期短。播种65—70天后,第一批花开放,开花期为10天,结桃成熟期为45—55天,一茬棉花共需135天的生长期。密植 Farms in the United States, Texas and other regions tested cotton plants for higher yields and significantly reduced growth periods. Allegedly, the number of cotton per acre from the traditional 2,500-12,000 increased to 33,000-50,000 lines, spacing from the traditional 81-107 cm reduced to 13-25 cm, the output increased by 10-30%. Cotton growth period from the usual 175-225 days shortened to 135 days. A number of farms received 107-114 pounds per acre lint yield. According to the test, dense cotton fields, cotton plants are relatively short, less branching, less flowers, short peach period. After planting 65-70 days, the first batch of flowers open, the flowering period of 10 days, ripe peaches 45-55 days, a total crop of cotton requires 135 days of growth. Close planting