控释BB肥对大葱生长和养分吸收规律的影响

Effects of Controlled Release Blend Bulk Fertilizers on the Growth and Nutrients Absorbing Rule of Green Chinese Onion

为筛选适合大葱生长的控释BB肥,本研究通过田间试验,探讨了控释BB肥对章丘大葱缓苗越夏期(8-9月)、旺盛生长期(9-10月)、假茎充实期(10-11月)和收获期(11月16日)鲜质量、株高及养分吸收规律的影响。结果表明:与习惯施肥处理相比,养分含量为14-9-18的控释BB肥处理的大葱鲜质量升高2.6%～58.9%,株高(10、11月份)增加6.9%～8.4%,氮、磷、钾肥利用率分别提高0.58～8.18、0.46～8.25、0.57～7.77个百分点。在本试验条件下,控释BB肥II为最佳施肥处理。建议将控释BB肥II在土壤中80d以后的氮素释放量增加,钾素释放时间提前10～20d。

In order to search out the suitable controlled released Blend Bulk fertilizer used for Green Chinese onion,field experiment was conducted.The effects of controlled release Blend Bulk fertilizers on fresh weight,stem length,and nutrients of Green Chinese onion were investigated,at over-summer-period（from August to September） ,luxuriant-growth-period（from September to October） ,cauloid-enrich-period（from October to November） and harvest-period（16th,November） .The results suggested that：after treated with controlled release Blend Bulk fertilizers II（CRBBF II） with N-P 2 O5-K2 O is 14∶9∶18,and compared with treated with customary fertilizer application,the fresh weight of Green Chinese onion increased by 2.6%-58.9%,stem length（October and November） increased by 6.9%-8.4%,N,P 2 O5 and K2 O recovery efficiency increased by 0.58-8.18,0.46-8.25,0.577.77 percentage point respectively.The CRBBF II was the best fertilizer application pattern in this experiment.The amount of N release after CRBBF II has been applied to soil for 80 days should be increased.Potassium release should be 10-20 days earlier.