商豆6号干物质积累和氮磷钾吸收特点的研究

Characteristics of Dry Matter Accumulation and N P K Absorption of Soybean Shangdou 6

以商豆6号为研究对象,探讨了高产夏大豆品种干物质积累和氮磷钾吸收特点。结果表明:在3 784.5 kg.hm-2产量水平下,商豆6号干物质积累以结荚～鼓粒期最快,占总积累量的53.68%,日均生长量450.55 kg.hm-2;结荚～鼓粒期氮、磷、钾吸收量最多,分别占总吸收量的47.27%、43.98%和46.54%;每生产100 kg籽粒,需要吸收N 8.25 kg、P2O51.97 kg、K2O 4.24 kg。综合分析,商豆6号高产应特别注意营养生长期肥料的配施,磷钾肥要集中基施,始花期追施氮肥,中后期喷施叶面肥。

In this paper,dry matter accumulation and N P K uptake of Shangdou 6 were studied. The results showed that,un- der the yield level of 3 784.5 kg·ha^-1, most dry matter, accounting for 53.68% of total, were accumulated from podding to seed filling, with average daily increasing rate of 450.55 kg. ha-1. The most amount of N, P20s and K20 were absorbed be- tween podding and seed filling, accounting for 47.27% ,43.98% and 46.54% of total, respectively. The production of 100 kg soybean seeds need 8.06 kg N, 1.97 kg P20s and 4.18 kg K20. So the combined application of N P K fertilizers, with P and K as centralized base fertilizer, N topdressed in the beginning of flowering and sprayed foliar fertilizer at seed filling were nec- essary for high yield of Shangdou 6. This study provided a theoretical basis for the rational fertilization for high-yield cultivation of summer soybean.