不同農業操作對台灣東部水稻田無脊椎動物多樣性之影響--結果與討論-1 - 農業知識入口網

一、有機農法確實有助東部稻田物種多樣性的維持
本次針對稻株地上部(shoot system)進行掃網調查共捕獲節肢動物門與軟體動物門7綱11目88科173屬209種46150隻。其中116種可在有機及慣行田區發現，而僅在有機田區中採獲者72種，僅在慣行田區中採獲者21種，各功能群之物種數皆以有機農法者較多(表一)。
表一、有機田與慣行田中，各生態功能群的物種數與相對豐量
Table 1. The numbers of species and relative abundance of each ecological function groups in organic and conventional fields.
 

Ecological function groups	No. of both appearedspecies	Organic fields		Conventional fields
		No. of sp.z	RAy ,%	No. of sp.	RA ,%
Pests*x	41	67	63.5%	48	49.1%
Pollinators	8	13	2.6%	12	2.3%
Graminivores	8	13	1.5%	9	1.9%
Neutral species*	16	20	17.1%	17	36.3%
Predators*	30	54	11.0%	35	7.6%
Parasitoids	13	21	3.8%	16	2.3%
Total No. of sp.	116	188		137

^znumbers of species of each ecological function in treatments
^yrelative abundance of each ecological function groups in treatments
^xTwo population proportions test, p<0.05