稻田光谱与水稻长势及产量结构要素关系的研究

THE RELATIONSHIP BETWEEN SPECTRUM IN PADDY FIELDS AND RICE GROWTH AND YIELD COMPONENTS

本文通过对水稻不同生育期的稻田光谱与水稻长势和产量结构的相关分析得出以下几点结论：（１）稻田光谱与水稻长势的相关性较好，特别是在水稻生长后期；（２）抽穗期，稻田光谱与决定水稻产量的各结构要素之间相关系数较高；（３）在水稻灌浆期，稻田光谱与水稻理论产量的相关性较好，特别是８００ｎｍ的反射光谱值：（４）水稻估产模型是：Ｙ＝６．６５ＰＶＩ＿Ｄ＋８．１９ＰＶＩ＿Ｈ＋４．４８ＰＶＩ＿（Ｍｔ）＋４．３６ＰＶＩ＿（Ｍｓ）－０．３，其中：Ｙ－水稻产量；ＰＶＩ－垂直植被指数，Ｄ，Ｈ，Ｍｔ，Ｍｓ，分别代表分化期、抽搐期、灌浆期及乳熟期。

This paper, by correlation analysis between the spectrum in paddy fields and rice growth in different stases, gives the conclutions as follows: 1. The relationship between spectrum in paddy fields and rice srowth is sood, especially in the late staSe of rice; 2. Near rice heading, the relationship between spectrum in paddy fields and rice yield components is high; 3. In the rice milk stase, the relationship between rice theory yield and spectrum in paddy fields is good, especially in 800um; 4. The model of rice yield estimation is:hear: PVI - standardized perpendicular vegetation index; D, H, Mf, Ms -differentiation, headinS' milkfilling, milky stage.