Yield Maps of Grain and Straw in Japanese Paddy Field
Yield Maps of Grain and Straw in Japanese Paddy Field
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日本稻田谷物和秸秆产量图
DOI：
10.11357/jsam1937.61.4_133
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发表时间：
1999
期刊：
影响因子：
--
通讯作者：
T. Kaho
中科院分区：
文献类型：
--
作者：
Choung;M. Iida;M. Umeda;T. Kaho
利用制图技术，在日本京都大学实验农场的0.5公顷稻田上，研究了水稻籽粒和秸秆产量的空间变异。试验植物为水稻，CV.高产量品种南光。为了考虑网格尺寸效应，采用1.2m宽1 m长、6 m宽5 m长和12 m宽10 m长三种矩形间距进行网格取样。在1.2m× 1 m的网格间距下，产量变异导致籽粒干重为5.5 ~ 9.7t/ha，秸秆干重为6.2 ~ 18.0t/ha。实验半变异函数揭示了粮食和秸秆产量的空间依赖性。【关键词】精准农业，空间变异性，粮食产量，半变异函数，产量图
Using mapping techniques, spatial variability of yields in grain and straw for rice plant was investigated aver a 0.5ha paddy field on the Experirnental Farm, Kyoto University, Japan. Test plant was Oryza sativa L., cv. MINAMI-HIKARI, a high-yield variety. Grid sampling was conducted with three rectangular spacings: 1.2m width and 1m length, 6m width and 5m length, and 12m width and 10m length, in order to take account of the grid size effects. In 1.2m×1m grid spacing yield variations resulted in 5.5 to 9.7t/ha for grain dry mass and 6.2 to 18.0t/ha for straw dry mass. Experimental semivariograms revealed the spatial dependency of yields with respect to grain and straw. [Keywords] precision agriculture, spatial variability, grain yield, semi-variogram, yield map