开放式增温与不同施氮量对冬小麦钙吸收利用的影响
毕业论文关键词：夜间增温；施氮量；冬小麦；钙
Effects of open warm up and nitrogen fertilizer application on calcium absorption and utilization of Winter Wheat
Abstract：【Object】Simulation of the future global warming asymmetric warming scenarios, on winter wheat before night warming and nitrogen treatment, changes of soil and winter wheat plant calcium content【Solution】Two wheat varieties Yangmai 13,adopting the open active warming device, setting temperature control (CK) and the night before the warming treatment (NT), from sowing to flowering day 18:00-6:00 uninterrupted warming two temperature treatments and pure nitrogen were 150 kg, 225 kg - HA-1 - HA-1 kg HA-1, 375 - three n【Result】Before night warming and nitrogen fertilization on soil exchangeable calcium content had no effect, effect on the calcium content of winter wheat stems, leaves and spikes in the respectively, lowering and lifting effect.【Conclusion】Before night warming and nitrogen application had no significant effect on the exchange of calcium content and calcium content of wheat stem and sheath state of the soil; it has no significant effect on the calcium content in winter wheat leaves, the amount of nitrogen was increased at 150 kg after HA-1, the amount of nitrogen decreased at 225kg after HA-1 and 375kg after HA-1, the interaction of the warming and fertilization of the total water as the main factors; increasing the role of the calcium content of winter warming in spikes, which are the main factors.
Key words: Night warming; nitrogen application rate; Winter Wheat; calcium
目 录
摘要1
关键词1
Abstract1
Key words1
引言2
1材料与方法2
1.1试验区概况 2
1.2材料与处理2
1.2.1试验材料2
1.2.2试验处理方法2
1.3测定方法及测定项目3
1.3.1温度测定 3
1.3.2土壤水分测定3
1.3.3各生长时期时土壤中钙素（交换态）的测定3
1.3.4各生长时期时植株体钙素含量的测定3
1.4数据处理分析3
2 结果和分析3
2.1开放式夜间增温的田间土壤含水量3
2.2开放式夜间增温试验地温度4
2.3土壤中钙素（交换态）含量4
2.4植株体内钙素含量5
3讨论 7
3.1增温和氮肥施用对土壤中交换态钙的影响7
3.2增温和氮肥施用对小麦茎鞘、叶片、穗中钙的影响 7
4结论 8
致谢8
参考文献8
开放式增温与氮肥施用对冬小麦钙吸收利用的影响 引言
由于全球气候的不断变化，全球变暖问题变的越来越严峻。相关文献指出，最近100年，中国的年平均地表气温显著增高，升温的幅度大概为0.5-0.8℃，这比同期的全球升温幅度的平均值还要略高一点[1]。最近的50年来，中国的增温尤为明显。在全球气候变暖的大背景下，粮食产量变得不稳定性增加。农业对气候变化的响应尤为敏感，增温会导致小麦的品质和产量的严重降低[2]。而氮素作为作物生长发育必需的营养元素，恰当的施用氮肥将会显著的提高作物品质和产量。但是过量的施用氮肥，不仅会影响小麦对氮素的利用效率，也会污染环境[3]。