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Effects of soaking seed and fertilizer placement on growth and yield of soybean grown after rice in the post-monsoon season in Khon Kaen Province
oleh: Anan Polthanee, Vidhaya Tre-loges
| Format: | Article |
|---|---|
| Diterbitkan: | Prince of Songkla University 2002-04-01 |
Deskripsi
The experiment was conducted in a farmer’s field in Ban Fang District, Khon Kaen Province in 1999- 2000. The objective of this study was to investigate the effect of soaking seed in water or not soaking before seeding, and fertilizer placement (surface broadcast at seeding, banding below the seed at seeding and banding beside the plant row 10 days after seeding) on growth and yield of soybean grown after rice in the postmonsoon season. The results showed that soaking seed before seeding had no significant effect on leaf area per plant, total top dry weight, root length density, pod number per plant, seed number per pod, 100-seed weight and seed yield of soybean. However, soybean growth, yield components and seed yields tended to be higher with no soaking. Therefore, soaking seeds in water before seeding had no advantage over no soaking in terms of early emergence and early maturity before the plant was subjected to water stress at grain filling phase. Fertilizer placement had a significant effect on growth nd yield of soybean. Banding application gave higher leaf area per plant, total top dry weight, root length density, pod number per plant and seed yield than those of broadcast application. Banding generally increased leaf N, P and K concentration. There was no significant difference in seed yield between belowband and sideband application. Belowband application tended to produce higher seed yield than that of sideband application. Belowband application at planting saved labour as compared with sideband application. To obtain a satisfactory yield of soybean grown following rice in the post-monsoon season during the rainless period, however, shallow depth of groundwater table to provide upward movement of water to the root zone should be considered.