摘要：为了明确太湖地区常规粳稻田缓释复混肥适宜用量，采用大田试验，以武运粳23号为试验材料，比较评价了缓释复混肥减量对水稻产量、茎蘖动态、干物质积累、叶面积指数、光合势和氮素吸收利用的影响。结果表明，缓释复混肥不同减量处理间水稻产量差异不显著，但减量20%处理的水稻产量显著高于CN处理（增产19.7%）。与CN处理相比，缓释复混肥处理的穗数明显增加，但结实率较低。与缓释复混肥常规用量相比，减量处理的水稻前期分蘖较慢，但后期成穗率较高。不同减量处理间抽穗期叶面积指数和拔节-抽穗期光合势差异显著，减量20%和30%处理的抽穗期叶面积指数和拔节-抽穗期光合势较高，利于光合产物积累，后期干物质重较高。与产量表现不一致的是，缓释复混肥常规用量下水稻植株氮含量和吸氮量显著增加，容易造成水稻氮素的奢侈吸收，而缓释复混肥减量10%和20%下植株氮含量与吸氮量与CN处理并无显著差异，但减量30%下氮含量和吸氮量明显较低。由于氮素用量的减少，缓释复混肥减量下氮素回收利用率明显高于CN处理。41910

毕业论文关键词：水稻；缓释复混肥；产量；氮素利用率

Study on the appropriate dosage of slow-release compound fertilizer in conventional japonica rice in Taihu Lake region

Abstract：In order to clarify the appropriate dosage of slow-release compound fertilizer in conventional japonica rice field in Taihu Lake area, the field experiment with Wuyunjing 23 as the experimental material was carried out. The effects of slow-release compound fertilizer on rice yield, tiller dynamics, dry matter accumulation Leaf area index, photosynthetic potential and nitrogen uptake and utilization was studied.The results showed that there was no significant difference in rice yield among different treatments, but the yield of the amount of processing was reduced by 20% was significantly higher than that of CN (increased by 19.7%). Compared with CN treatment, the number of panicles in slow-release compound fertilizer treatments was significantly increased, but the seed setting rate was lower. Compared with the conventional dosage of slow-release compound fertilizer, the tillage for decrement treatments was lower in the early stage of rice, but the late panicle rate was higher.The leaf area index at heading stage and the photosynthetic potential at jointing stage to heading stage were significantly different, and the leaf area index at heading stage and the photosynthetic rate at jointing stage to heading stage were higher at 20% and 30% reduction treatments, which was beneficial to the accumulation of photosynthate and increase the dry matter weight.In contrast to the yield, the nitrogen content and N uptake of rice plants under the conventional dosage of slow-release compound fertilizer were significantly increased, which resulted in the extravagance of nitrogen loss in rice and 10% and 20% There was no significant difference between nitrogen content and N uptake and CN treatment, but the nitrogen content and N uptake were significantly lower at 30% reduction treatment. Due to the decrease of nitrogen consumption, the nitrogen recovery and utilization rate of slow release compound fertilizer was significantly higher than that of CN treatment.

Key words: Rice；Slow release compound fertilizer；Yield；Nitrogen utilization

目  录

摘要3

关键词3

Abstract3

Key words3

引言（或绪论）3

1□材料与方法4

1.1□试验设计 4

1.2□采样及测定方法5

1.2.1□茎蘖动态5

1.2.2□植株样品采集与测定5

1.2.3□产量及产量构成测定 5

1.2.4□氮含量测定方法     5

1.3□统计分析方法5

2□结果分析5

2.1□缓释复混肥减量对水稻产量及穗粒结构的影响5