作物生长中光照和氮肥施用量的相互关系研究  

INTERRELATIONSHIP OF LIGHT AND NITROGEN FERTILIZER APPLICATION IN CROP GROWTH

作　　者：曾希柏[1] 青长乐[2] 谢德体[2] 侯光炯[2] 

机构地区：[1]中国农业科学院农业自然资源和农业区划研究所山区研究室,北京100081 [2]西南农业大学资源环境学院,重庆400716

出　　处：《土壤学报》2000年第3期380-387,共8页Acta Pedologica Sinica

摘　　要：应用盆栽试验，在人工气候箱内进行的研究结果表明：光照强度（Ｘ１，μｍｏｌ／ｍ２·ｓ）和氮肥施用量（Ｘ２，ｇ／ｐｏｔ）均对莴笋生长及生物量产生影响，且二者的变化与莴笋生物量的关系可表示为ｙ＝－０．３７５＋０．０２３０Ｘ１＋９．４２ｌＸ２＋０．０２５ｌＸ１Ｘ２－０．１３１×１０－４Ｘ１２－１７．７９４Ｘ２２形式；不同光照强度下氮肥施用量与莴笋生物量的关系均可表示为ｙ＝ｂ０＋ｂ１Ｘ＋ｂ２Ｘ２形式；不同氮肥施用量下，光照强度与莴笋生物量的关系亦可用二次或三次多项式来表示。根据研究结果，还求得了氮肥施用量（Ｘ２）与光照强度（Ｘ１）的关系为：Ｘ２＝０．４４６－０．４７７×１０－２Ｘ１＋０．２６９ ×１０－４Ｘ１２－０．３９４×１０－７Ｘ１３。此外，本研究还探讨了光照强度、氮肥施用量与莴笋的氮素营养状况的关系。By using the method of pot culture experiment in the case of artificial climate, the result indicated that the effects of light intensity (X1) and N application (X2) on lettuce yield (y) were mathematically represented by the following equation in this study:y = -0.375 + 0.0230X1+9.42lX2+0.0251X1X2-0.131 × 10-4X12-17.794X22;The efficiency of N fertilizer was influenced by light intensity. A quadratic multinomial equation y = b0 + b1X+b2X2, could be used to describe the correlation between N application and lettuce yield. Also, quadratic or cubic multinomial equation could be used to describe the correlation between light and lettuce yield. Accordingly, the effects of light intensity (X1) on N application (X2) were mathematically represented by the following equation:X = 0.446 - 0.477 × 10-2X1 + 0.269×10－４X12-0.394 ×10-7X13. Moreover, nitrogen nutrition of lettuce was bigger influenced by light and N application.

关 键 词：莴笋 氮肥 光照强度 生物量 作物 产量品质 

分 类 号：S143.1[农业科学—肥料学] S314[农业科学—农业基础科学]