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本文阐明了江苏早稻灌浆结实期阴害大约10年5遇;中、晚稻阴害约10年4～5遇。水稻遭受阴害后,植株体内糖氮比例失调,叶片叶绿素(a+b)含量下降,光合作用受阻,导致结实率和千粒重下降。然而,不同品种的耐阴特性各异,阴害使籼稻类型品种植株的可溶糖和淀粉含量下降多;含氮量的增加,籼(杂交)粳稻无明显差异,剑叶叶绿素含量、结实率和千粒重的减少率,品种间差异颇大。随着施氮量和肥料的组合不同,水稻耐阴特性亦有明显差异。
This paper clarifies that the early maturing of rice in Jiangsu during the silting period of about 10 years and 5 encounters; middle and late rice overcast pests about 4 to 5 years. After the rice was overcast, the ratio of sugar and nitrogen in the plant was imbalanced, the content of chlorophyll (a + b) in the leaves was decreased, and the photosynthesis was blocked, leading to the decrease of seed setting rate and 1000-grain weight. However, the shade-tolerant traits of different cultivars were different, and the overharm reduced the soluble sugar and starch content in the indica rice varieties. The nitrogen content increased but the indica (hybrid) japonica rice had no significant difference. The chlorophyll content, seed setting rate And the reduction rate of 1000-grain weight, a great difference between varieties. With the different amount of nitrogen fertilizer and fertilizer combinations, rice shade-tolerant characteristics are also significantly different.