不同肥料对黄花美冠兰生长发育影响的数学模型研究

黄花美冠兰是一种野生热带兰，具有重要的开发利用前景。在自然条件下，采用不同的肥料处理，观察黄花美冠兰生长发育的状况，并对种球干物质、种球横径大小进行了数理统计。结果表明：随着N、P、K和牛肥的增加，干物质增加。不同处理对黄花美冠兰干物质的影响，是磷肥〉钾HE〉氮肥〉牛肥。施N120～195kg／hm^2、P2O5 60-75kg／hm^2、K2O 150-165kg／hm^2、有机肥15～16．5t／hm^2时，黄花美冠兰种球的干物质含量较高。氮、钾、有机肥施用量与横径存在正相关关系，不同处理对种球的横径大小影响为，磷HE〉牛肥〉氮HE〉钾肥。黄花美冠兰种球大小与开花率成正相关性，种球越大，开花率越高。在施N150～180kg／hm^2、P2O5 45-60kg／hm^2、K2O 157．5～165kg／hm^2、牛肥18．75～19．5t／hm^2时，黄花美冠兰种球横径可达4．5cm以上。

Establishment of Math Model for Effects of Different Fertilizers on the Growth and Development of Bulbs of Eulophia flava

Eulophia flava is a tropical wild orchid and deserves development.Different fertilizers were applied to E.flava under the same natural conditions to observe its growth and development, and the dry matter content and size of the bulbs were statistically analyzed.The results showed that the dry matter content of the bulbs increased with N, P, K fertilizers and organic fertilizer cow dung.The effects of different fertilizers on the dry matter content of the bulbs were in the order of P>K>N>cow dung.The dry mat...