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按照生态农业理论和抗旱节水技术要求,对棉花抗旱品种、不同密度、不同基肥N、P的施用量进行田间综合试验,采用正交设计法。3年试验研究结果表明:密度以每公顷种植7.5万株比4.5万株、6万株平均增产671.85kg、483.30kg,增产57.49%和41.36%。品种陕402(早熟)、陕576(中早熟)分别比中棉所19(中熟)增产16.62%和16.17%,具有较强抗旱性。磷酸二铵比尿素增产作用明显,每公顷施150、225kg分别增产11.35%和10.53%。
In accordance with the theory of ecological agriculture and technical requirements of drought-resistant and water-saving, field experiments were conducted on cotton drought-resistant varieties, different densities and different basal fertilizer N and P application rates. The orthogonal design method was used. The result of 3 years trial showed that the density was 75,000 plants per hectare and 45,000 plants. The average yield of 60,000 plants was 671.85kg, 483.30kg, and the yield was increased by 57.49% and 41.36% respectively. The cultivars Shan 402 (early maturing) and Shaan 576 (early maturing) increased 16.62% and 16.17% respectively compared with 19 (medium maturity) of Zhongmiansuo, with strong drought resistance. The diammonium phosphate has a higher yield than urea, with an increase of 11.35% and 10.53% respectively with 150,225kg applied per hectare.