Effects of Soft Rock and Biochar Applications on Millet (Setaria italicaL.) Crop Performance in Sandy Soil
Effects of Soft Rock and Biochar Applications on Millet (Setaria italicaL.) Crop Performance in Sandy Soil
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DOI：
10.3390/agronomy10050669
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发表时间：
2020-05-01
期刊：
影响因子：
3.7
通讯作者：
Zhang, Suiqi
中科院分区：
文献类型：
--
作者：
Sun, Yingying;Zhang, Ningning;Zhang, Suiqi
在干旱和半干旱地区，荒漠化威胁作物生产，因为它降低了土壤保持水分和土壤养分的能力。在两个肥料水平(90 kg N hm(-2)和45 kg P hm(-2)和270 kg N hm(-2)和135 kg P hm(-2))下，研究了软岩(沙：软岩=3：1)和生物炭(4500 kg hm-2)对土壤水分、土壤养分和谷子的影响。2018-2019年在中国毛乌素沙地进行了光合作用、产量及其农艺性状(生物量、千粒重、收获指数)的田间试验。单独添加生物炭和软岩可显著提高土壤含水量、碱解氮(AN)、全氮(TN)、磷(TP)和有机质含量，表明生物炭和软岩的应用可以提高土壤的养分和持水能力。单施生物炭和软岩可提高谷子开花期旗叶净光合速率，由15.97%提高到56.26%。在相同施肥量下，施用生物炭和软岩可使产量范围(2109.0~5024.7 kg hm-2)由5.26%提高到54.60%。相关分析表明，开花期籽粒产量与光合作用速率呈极显著正相关，与开花期土壤硝态氮、开花期和收获期土壤总磷、开花期土壤全氮显著相关。这些结果表明，单施生物炭和软岩可以增加土壤持肥能力，提高开花期的光合作用速率，从而提高作物产量。
In arid and semi-arid regions, desertification threatens crop production because it reduces the soil's capacity to retain water and soil nutrients. At two fertilizer levels (90 kg N hm(-2)and 45 kg P hm(-2)and 270 kg N hm(-2)and 135 kg P hm(-2)), the effects of soft rock (sand: soft rocks = 3:1) and biochar (4500 kg hm(-2)) applications on soil moisture, soil nutrients, and millet (Setaria italicaL.) photosynthesis, yield, and its agronomic traits (biomass, thousand kernel weight, harvest index) were investigated in a field experiment in the Mu Us Sandy Land of China in 2018-2019. The addition of biochar and soft rock singly increased soil water content, alkali-hydrolyzed nitrogen (AN), total nitrogen (TN) and phosphorus (TP), and organic matter content significantly, suggesting that their application may increase the nutrient and water holding capacity of soil. Application of biochar and soft rock singly increased the net photosynthesis rate of millet flag leaf, at the flowering stage, from 15.97% to 56.26%. Biochar and soft rock application increased the yield range (2109.0 kg hm(-2)to 5024.7 kg hm(-2)) from 5.26% to 54.60% under the same fertilizer level. Correlation analyses showed grain yield was significantly correlated with photosynthesis rate at the flowering stage, which was significantly correlated with soil AN at flowering, soil TP at flowering and harvest, and soil TN at flowering. These results indicated that the application of biochar and soft rock singly could increase soil fertilizer holding capacity to improve the photosynthesis rate at flowering, and, therefore, lead to improvements in crop yield.