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首页> 外文期刊>Plant and Soil >Response of wheat genotypes to sowing date and boron fertilization aimed at controlling sterility in a rice-wheat rotation in Nepal.
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Response of wheat genotypes to sowing date and boron fertilization aimed at controlling sterility in a rice-wheat rotation in Nepal.

机译：小麦基因型对播种期和硼肥的响应旨在控制尼泊尔稻麦轮作中的不育性。

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摘要

In a field experiment in 1994/95 at Rishing Patan, Nepal, wheat cv. SW-41 and BL-1022 (boron susceptible) and Fang-60 and BL-1249 (boron tolerant) were sown on 21 November or 6 or 21 December with or without application of 1 kg B ha-1 (i.e. 9 kg borax ha-1) on a soil that was known to be deficient in boron. Sowing on 21 December significantly increased sterility and gave the lowest 1000-seed weight and grain yield (almost 50% lower than with sowing on 21 November). Terminal moisture stress (i.e. lack of moisture during the latter part of development) was observed in the late-sown crop which also amplified the extent of sterility associated with boron deficiency. Cultivars differed in response to sowing dates and boron treatment for all of the phenological events measured, yield components, grain yield and percentage sterility. SW-41 and BL-1022 had significantly higher sterility at all sowing dates. BL-1249 showed a consistently lower percentage sterility with all sowing dates and boron treatments. The addition of boron significantly increased the number of grains set per spike thereby decreasing the total sterility in the boron-susceptible SW-41 and BL-1022. The boron concentration in the flag leaf at anthesis was increased in treatments with added B.
机译：在1994/95年尼泊尔Rishing Patan的田间试验中，小麦品种SW-41和BL-1022（对硼敏感）以及Fang-60和BL-1249（对硼耐受）于11月21日或12月6日或12月21日播种，无论是否施用1 kg B ha-1（即9 kg硼砂ha） -1）在已知缺硼的土壤上。 12月21日播种大大提高了不育性，使1000粒重和谷物产量最低（比11月21日播种低近50％）。在后期播种的作物中观察到最终的水分胁迫（即发育后期缺乏水分），这也加剧了与硼缺乏相关的不育程度。在所有测得的物候事件，产量构成，谷物产量和不育百分比方面，品种对播期和硼处理的反应不同。 SW-41和BL-1022在所有播种期均具有较高的不育性。 BL-1249在所有播种期和硼处理下均显示出较低的不育百分比。硼的添加显着增加了每个峰值的晶粒数目，从而降低了对硼敏感的SW-41和BL-1022的总无菌性。添加B处理后，花期剑叶中的硼浓度增加。

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