愛知県において77年間継続した四要素及び堆肥施用試験における各要素の効果発現の特徴と気象条件との関係

日本作物学会紀事

釋 一郎¹  濱田 千裕¹  籾井 隆志¹  松家 一夫¹  中嶋 泰則¹  林 元樹¹ 

[1] 愛知県農業総合試験場安城農業技術センター

关键词: Climatic condition;    気象条件;    Consecutive study;    連用試験;    Effect of compost;    堆肥の効果;    Effects of potassium and lime;    カリ・石灰の効果;    Four elements;    四要素;    Principal component analysis;    主成分分析;    Rice;    水稲;   

DOI  :  10.1626/jcs.79.336

学科分类：农业科学（综合）

来源: Nihon Sakumotsu Gakkai / Crop Science Society of Japan

【 摘 要 】

The fertilizing effects of four major elements (N, P, K, Ca) and compost in the rice fi eld have been recorded since 1926. Using the experimental data obtained during 77 years until 2002, we performed principal component analysis (PCA) to examine how the yield of rice was infl uenced by each fertilizer element in each year. We found two principal components by using PCA. The fi rst component was considered to relate with the yield when both N and P were applied, and the second with the yield when N and/or P (N or P or both) were not applied. We classifi ed the experimental years according to the result of the PCA, and examined the characteristics of fertilizing effects and climatic conditions in each year group. In the groups with high yield and with both N and P application, the effects of K and Ca were low, and compost was effective. In the groups with high yield and without N or P application, sunlit period was long, when the effects of K and Ca application with both N and P were high. In the groups with long sunlit period, the yield in the plots without K or Ca application was lower than that in the plots fertilized with N, P, K and Ca. This may be because absorption of K was suppressed by defi ciency of K or Ca, and photosynthesis under (in) low humidity was greatly suppressed under such conditions. The results suggest that application of K and Ca with both N and P is more effective under the conditions suitable for photosynthesis with long sunlit period.

【 授权许可】

Unknown