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以郑麦9023为材料,通过不同水肥耦合处理,研究了水肥耦合下小麦产量及根际土壤环境变化的差异。结果表明:在同一水分条件下,增施氮肥显著增加单位面积穗数,最终产量表现为N2>N3>N1;同一氮肥处理下,灌水处理增加了穗粒数及千粒重,平均增加4.2%与2.9%,最终产量提高9.3%;从耦合效益看,W2N2处理下产量最高;W2N2处理提高土壤有机酸含量、土壤酶活性及土壤全氮含量;与N2相比,N3处理土壤有机酸总量、脲酶、过氧化氢酶及土壤全氮含量平均下降13.7%、3.9%、5.6%及2.1%;土壤有机酸及全氮含量与脲酶及过氧化氢酶活性呈极显著正相关,与碱性磷酸酶呈显著正相关。对不同肥水处理下产量形成及根际土壤环境的差异进行了讨论。
Taking Zhengmai 9023 as material, the differences of wheat yield and rhizospheric soil environment under water and fertilizer coupling were studied by different water and fertilizer coupling treatments. The results showed that under the same water condition, nitrogen application significantly increased the number of spikes per unit area, and the final yield was N2> N3> N1. Under the same nitrogen fertilizer treatment, irrigation treatment increased the number of grains per spike and 1000-grain weight with an average increase of 4.2% and 2.9 %, The final yield increased by 9.3%; From the perspective of coupling efficiency, the yield was the highest under W2N2 treatment; W2N2 treatment increased soil organic acid content, soil enzyme activity and soil total nitrogen content; Compared with N2, N3 treatment soil organic acid, , Catalase and soil total nitrogen decreased by 13.7%, 3.9%, 5.6% and 2.1% on average. The contents of organic acids and total nitrogen in soil were significantly and positively correlated with the activities of urease and catalase, There was a significant positive correlation. The differences of yield formation and rhizosphere soil environment under different fertilizer treatments were discussed.