高产条件下大蒜干物质积累和养分吸收规律的研究

Dry matter accumulation and nutrient absorptions for garlic in high yield condition

以地方品种金乡白皮蒜为试材,进行不同施肥处理试验,研究高产条件下大蒜干物质积累和养分吸收规律。结果表明:大蒜从种植到鳞芽花芽分化期,干物质积累缓慢,积累量占20.4%;鳞芽和花芽分化后,干物质积累加快;鳞茎膨大期干物质积累达到高峰。大蒜的干物质积累和养分吸收趋势基本一致。整个生育期大蒜吸收N248.1kg/hm2,吸收P40.2kg/hm2,吸收K151.4kg/hm2,吸收比例为1∶0.16∶0.61,大蒜对N的吸收主要集中在中后期,对P、K的吸收则主要集中在中前期。

In order to study the dry matter accumulation and nutrient absorptions of garlic in the high yield crop systems, the locally current varieties ＇white garlic＇ was taken as materials to conduct different fertilization application experiment. The results showed that the dry matter accumulated slowly from the beginning of planting to the end of flower bud differentiation phase, accounting for 20.4% of the total, then a rapid increase occurred and the peak of dry matter accumulation was at bulb expanding phase. The same trend occurred for nutrient absorptions. The absorbed nutrient rates for garlic were： N 248.1 kg/hm^2, P 40.2 kg/hm^2, K 151.4 kg/hm^2 with the ratio of 1 ： 0.16 ： 0.61, respectively, during the whole growing season. It was shown that N absorption was intensified in the mi＆late growing period, while the P and K absorption in the early-mid growing period.