目录
摘要Ⅰ
关键词Ⅰ
AbstractⅡ
引言
引言1
1 材料与方法1
1.1试验地点和材料 1
1.1.1试验地点1
1.1.2试验材料2
1.2试验设计 2
1.3测定项目及方法 2
1.3.1地上部鲜重及干重、株高、茎粗2
1.3.2地下部鲜重及干重、根长、根粗2
1.3.3根瘤鲜重2
1.3.4固氮酶活性2
1.4数据处理与统计分析 3
2 结果与分析3
2.1磷肥施用量对越冬前紫云英地上部生长的影响3
2.1.1磷肥施用量对越冬前紫云英地上部鲜重的影响3
2.1.2磷肥施用量对越冬前紫云英地上部干重的影响5
2.1.3磷肥施用量对越冬前紫云英株高的影响5
2.1.4磷肥施用量对越冬前紫云英茎粗的影响5
2.2磷肥施用量对越冬前紫云英地下部生长的影响6
2.2.1磷肥施用量对越冬前紫云英地下部鲜重的影响6
2.2.2磷肥施用量对越冬前紫云英地下部干重的影响7
2.2.3磷肥施用量对越冬前紫云英根长的影响7
2.2.4磷肥施用量对越冬前紫云英根粗的影响8
2.3磷肥施用量对越冬前紫云英根瘤特性的影响8
3 讨论 9
3.1磷肥施用与紫云英地上部生长发育的关系9
3.2磷肥施用与紫云英地下部生长发育的关系10
3.3磷肥施用与紫云英根瘤生长发育的关系10
4 结论 11
致谢12
参考文献13
不同磷肥施用量对紫云英越冬前生长效应的影响分析
摘要
为探究不同磷肥施用量对越冬前紫云英生长效应的影响，明确最适合紫云英生长的磷肥施用量，为紫云英的磷肥高效利用以及增产提供技术支持，本试验以冬季绿肥紫云英为试验材料设计了单因素盆栽试验。施磷量设置4个水平（以纯磷计）：0（CK，不施磷）、30 kg.hm2（少施）、60 kg.hm2 *51今日免费论文网|www.51jrft.com +Q: &351916072& 
（中施）、90 kg.hm2（重施），分别用简写P0、P1、P2、P3表示，在紫云英越冬前（1月13日）进行收获，测量越冬前紫云英的地上部、地下部、根瘤特性各项指标。研究表明，适当施用磷肥能显著促进紫云英在越冬前各个营养器官的生长、养分的积累以及根瘤生长，在中量施加磷肥（施入60 kg.hm2纯磷）处理时越冬前紫云英生长效应最好，紫云英的地上部鲜重及干重、地下部鲜重及干重、根瘤鲜重、固氮酶活性均达到最大值，株高、茎粗、根长及根粗在此处理下也达到最大。但磷肥施用过量则导致越冬前紫云英生长不良，表现为植株的株高变矮，根瘤鲜重、固氮酶活性降低，地上部鲜重及干重、地下部鲜重及干重下降，以及根长变短，根粗减小。
ANALYSIS OF THE EFFECTS OF DIFFERENT PHOSPHATE APPILICATION LEVELS ON THE GROWTH OF CHINESE MILK VETCH BEFORE OVERWINTERING
ABSTRACT
In order to explore the effects of different P application levels on the growth of Chinese milk vetch before overwintering, determine the most suitable Phosphate application levels for Chinese milk vetch growth, and provide technical support for the efficient utilization of P fertilizer and the increase of production of Chinese milk vetch, a single factor pot experiment was designed with Chinese milk vetch green fertilizer in winter as the experimental material. Four levels of P rate (calculated by pure p): 0 (CK, no P rate), 30 kg.hm2 (less P rate), 60 kg.hm2(medium P rate) and 90 kg.hm2 (heavy P rate), which are respectively abbreviated as P0, P1, P2 and P3. Before the overwintering (January 13), the aboveground part, belowround part and root nodule characteristics of Chinese milk vetch were measured. The results showed that proper rate of P fertilizer could significantly promote the growth of various vegetative organs, nutrient accumulation and root nodule growth of Chinese milk vetch. The growth effect of Chinese milk vetch was the best when P fertilizer was applied in a medium amount. The fresh weight and dry weight of aboveground biomass, fresh weight and dry weight of belowground biomass, fresh weight of root nodule and nitrogenase activity of Chinese milk vetch were the highest The plant height, stem diameter, root length and root diameter also reached the maximum under this treatment. However, the excessive rate of phosphorus fertilizer resulted in the poor growth of Chinese milk vetch clouds before overwintering, which showed that the plant height became shorter, the fresh weight of nodule and the activity of nitrogenase decreased, the fresh weight and dry weight of the aboveground biomass, the fresh weight and dry weight of the belowground part decreased, and the root length became shorter and the root diameter became smaller.

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