施氮量和种植密度对海岛棉冠层结构和光合特性的影响

王丽, 张承洁, 胡浩然, 宁丽云, 吴一帆, 郭仁松, 张巨松

Effects of Nitrogen Application Rate and Planting Density on Canopy Structure and Photosynthetic Characteristics of Sea Island Cotton

Wang Li, Zhang Chengjie, Hu Haoran, Ning Liyun, Wu Yifan, Guo Rensong, Zhang Jusong

表3 施氮量和种植密度对海岛棉产量及其构成因素的影响

Table 3 Effects of nitrogen application and planting density on yield and its components of sea island cotton

种植密度 Planting density 施氮量 Nitrogen application rate (kg/hm2) 收获株数（万株/hm2） Number of plants harvested (×104 plants/hm2) 单株结铃数 Bell number per plant 单铃重 Single bell weight (g) 衣分 Lint percentage (%) 籽棉产量 Seed cotton yield (kg/hm2) 皮棉产量 Lint cotton yield (kg/hm2) D20 N0 17.81c 8.29cde 2.96a 33.94ab 4410.13d 1493.14cd N1 18.08c 8.90abcd 3.17a 33.99a 5105.85bcd 1737.58bcd N2 18.01c 10.27a 3.03a 33.07abc 5609.19abc 1857.32abcd N3 17.95c 9.86ab 3.08a 33.35abc 5467.91abcd 1822.17abcd D24 N0 22.33b 7.91cde 2.62bc 33.48abc 4617.89cd 1542.42cd N1 22.47b 7.60de 3.08a 33.11abc 5237.51abcd 1735.25bcd N2 22.27b 9.26abc 3.07a 33.70ab 6337.17a 2145.50a N3 22.40b 8.35bcde 3.03a 33.25abc 5655.41abc 1881.20abc D28 N0 24.97a 7.51de 2.46c 32.01bc 4598.71cd 1473.33d N1 24.22a 7.32e 2.99a 31.70c 5278.54abcd 1672.56cd N2 24.56a 8.52bcde 2.98a 33.23abc 6242.89ab 2074.55ab N3 24.43a 8.46bcde 2.92ab 34.33a 6045.35ab 2080.52ab 施氮量 (N) ns ** ** ns ** ** 种植密度 (D) * ** * ns ns ns 施氮量×种植密度 (D×N) ns ns ns ns ns ns