Effects of Dense Planting on the Dry Mater Production of Summer Planted Sugar Cane

Japanese Journal of Crop Science

Seiichi MURAYAMA¹  Akihiro NOSE¹  Kiyomatsu MIYASATO¹  Misao NAKAMA¹ 

关键词: Crop growth rate;    乾物生産;    Dry matter production;    個体群生長速度;    Leaf area index;    栽植密度;    Marl soil;    サトウキビ;    Planting density;    葉面積指数;    Ryukyu limestone soil;    琉球石灰岩土壌;    Sugar cane;    泥灰岩土壌;   

DOI  :  10.1626/jcs.58.279

学科分类：农业科学（综合）

来源: Nihon Sakumotsu Gakkai / Crop Science Society of Japan

【 摘 要 】

Sugar cane (Saccharum officinarum L. c. v. NCo 310) planted in summer was grown in a dense planting block (135×20 cm) and standard planting block (135×40 cm) in a marl soil field (MF) and Ryukyu limestone soil field (RLF). The time courses for dry matter production in the dense planting block were clearly. different from those of the standard planting block. In dense planting block, the maximum standing crop per land area (MSC) was obtained in August one year after planting. Then the standing crop decreased until harvest. In standard planting block, MSC was obtained at the ripening stage. Maximum crop growth rate (Cmax) in the dense planting block on MF and RLF was 45.24 g/m2/day and 39.12 g/m2/day, respectively, and they were obtained in summer season. At this time, mean leaf area index (LAImean) and solar energy utilization (Eu) in the dense planting block on MF and RLF showed higher values of 7.54 and 4.43%, and 4.87 and 3.92%, respectively. Mean CGR in a year after planting on MF and RLF was higher in the dense planting block (18.92 g/m2/day and 17.16 g/m2/day) than the control block (12.66 g/m2/day and 11.25 g/m2/day). High CGR in the dense planting block depended on high LAI which was resulted from increasing stalk numbers per land area. In addition, it is suggested that the favorable effect of dense planting on dry matter production can shorten the growth duration of summer-planted sugar cane to two-thirds of that in the standard planting block.

【 授权许可】

Unknown