
Basal Application and Topdressing of Selenium-enriched Organic Fertilizers: Effects on Chlorophyll Fluorescence, Yield and Selenium Enrichment of Wheat
Ma Jie, Yin Xuehong, Li Zhi, Yang Juan, Zheng Guoqi, Liang Xinhua
Basal Application and Topdressing of Selenium-enriched Organic Fertilizers: Effects on Chlorophyll Fluorescence, Yield and Selenium Enrichment of Wheat
In order to ensure the safe production of selenium-rich agricultural products and provide a theoretical basis for high efficient selenium enrichment of wheat, wheat variety ‘Ningchun 55’ was used as material in this study. Under the condition of field experiment, the effects of different application methods and application rates of selenium-enriched organic fertilizers on chlorophyll fluorescence, yield and selenium content of aboveground organs of wheat were studied. The results showed that the chlorophyll content and chlorophyll fluorescence value increased with the increase of selenium application rate, and there were significant differences in chlorophyll content and Fo of wheat leaves at booting stage and filling stage under the two selenium application methods. The total selenium content in wheat stem and wheat bran of different treatments was significantly higher than that of the control. On the whole, the total selenium content of aboveground organs of basal application of selenium-enriched organic fertilizer was higher than that of topdressing, but the difference between them was not significant. The results showed that the two fertilization methods had a certain promoting effect on the accumulation of selenium in wheat. Under the basal application mode, the wheat yield increased by 0.9%-8.9% compared with the control, while under topdressing, the wheat yield decreased at first and then increased, and there was no significant difference in wheat yield between the two fertilization methods. Therefore, according to the chlorophyll fluorescence, yield and selenium enrichment effect of wheat under the two fertilization methods, it is suggested that basal application of selenium-enriched organic fertilizer should be carried out in the production of wheat selenium-rich agricultural products to reduce the agronomic operation of wheat and reduce the cost of labor input.
selenium content / grain quality / exogenous selenium in wheat / photosynthetic physiology / yield {{custom_keyword}} /
表1 小麦基施富硒有机肥试验设计方案 |
处理 | 施肥方式 | 施肥量 |
---|---|---|
CK | 基施 基施+追施 | 苏州硒谷富硒有机肥0 kg/ hm2+10 kg/ hm2商品有机肥 苏州硒谷富硒有机肥0 kg/ hm2+商品有机肥10 kg/ hm2 |
T1 | 基施 基施+追施 | 苏州硒谷富硒有机肥0.33 kg/ hm2+9.67 kg/ hm2商品有机肥 苏州硒谷富硒有机肥0.33 kg/ hm2+商品有机肥9.67 kg/ hm2 |
T2 | 基施 基施+追施 | 苏州硒谷富硒有机肥0.67 kg/ hm2+9.33 kg/ hm2商品有机肥 苏州硒谷富硒有机肥0.67 kg/ hm2+商品有机肥9.33 kg/ hm2 |
T3 | 基施 基施+追施 | 苏州硒谷富硒有机肥1 kg/ hm2+9 kg/ hm2商品有机肥 苏州硒谷富硒有机肥1 kg/ hm2+商品有机肥9 kg/ hm2 |
T4 | 基施 基施+追施 | 苏州硒谷富硒有机肥1.33 kg/ hm2+8.67 kg/ hm2商品有机肥 苏州硒谷富硒有机肥1.33 kg/ hm2+商品有机肥8.67 kg/ hm2 |
注:供试富硒有机肥肥料由江苏省硒生物工程技术研究中心提供,富硒有机肥(技术指标:有机质≥45%,N+P2O5+K2O≥5%、总硒≥1000mg/kg,剂型粉剂)。商品有机肥为贝特生物有机肥(技术指标:有机质≥40%,N+P2O5+K2O≥10%、腐殖酸≥17%、氨基酸≥11%、硫≥8%,灰色颗粒)。 |
表2 基施富硒有机肥对土壤理化性质变化 |
处理 | 硒mg/kg | 全盐/(g/kg) | pH | 有机质g/kg | 速效氮mg/kg | 速效钾mg/kg | 速效磷mg/kg |
---|---|---|---|---|---|---|---|
CK | 0.19 | 0.17 | 8.42 | 24.4 | 69.1 | 210.0 | 34.3 |
T1 | 0.21 | 0.17 | 8.41 | 24.8 | 76.6 | 193.0 | 37.6 |
T2 | 0.20 | 0.15 | 8.35 | 26.2 | 75.1 | 204.0 | 40.3 |
T3 | 0.22 | 0.19 | 8.33 | 25.7 | 75.1 | 223.0 | 35.7 |
T4 | 0.21 | 0.17 | 8.37 | 23.4 | 67.6 | 210.0 | 35.9 |
表3 追施富硒有机肥对土壤理化性质变化 |
处理 | 硒/(mg/kg) | 全盐/(g/kg) | pH | 有机质g/kg | 速效氮mg/kg | 速效钾mg/kg | 速效磷mg/kg |
---|---|---|---|---|---|---|---|
CK | 0.23 | 0.22 | 8.40 | 23.1 | 72.1 | 214.0 | 36.9 |
T1 | 0.23 | 0.13 | 8.43 | 21.9 | 79.6 | 175.0 | 27.9 |
T2 | 0.26 | 0.17 | 8.41 | 22.9 | 64.6 | 170.0 | 30.7 |
T3 | 0.25 | 0.17 | 8.55 | 24.2 | 31.5 | 216.0 | 40.0 |
T4 | 0.20 | 0.20 | 8.38 | 23.0 | 64.6 | 204.0 | 42.0 |
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