摘要
本文研究了不同施肥量对高产夏玉米器官中氮、磷、钾的吸收、积累和分配的影响，并对施肥量问题进行了探讨。结果表明，玉米在氮、磷、钾累积吸收数量和消长速度上，高肥量处理显著高于低肥量处理（ｔ＝０．０５）。施肥量基本不影响磷和钾的吸收动态，而氮的吸收动态两处理间不一致。玉米在氮的吸收过程中，高肥量处理出现两个高峰，分别在大喇叭口期和吐丝后１５天．而低肥量处理只在大喇叭口期出现一个高峰．掖单５１号每公顷生产１１６１３公斤子粒，最高需肥量Ｎ２３０．２５公斤、Ｐ２Ｏ５１０４．２５公斤、Ｋ２Ｏ２１２．７０公斤．三要素的比例为１：０．４５：０．９２，生产百公斤子粒所需Ｎ、Ｐ２Ｏ５、Ｋ２Ｏ分别为１．９８３、０．８９８、１．８３２公斤．氮、磷、钾的最大吸收强度分别为４．８６、２．４９、７．６２公斤·公顷－１·日－１，完熟期子粒中的氮、磷、钾分配率分别为５８．９０、８２．４０和１２．５０％．
This paper dealed with the effect of different rates of fertilizer on uptake,accumulation and partition of N,P, K by hgh-yield summer-sown corn, and made a probe into the rates of applied ferilizer. The result showed the amounts and growth and decline rate of N,P,K of high fertilizer treatment(HFT) were significantly more than those of low fertilizer treatment (LFT) (t =0.05). The uptake trends of P,K were not affected by fertilizer treatments, but that of N was different between fertilizer treatments. There were two peaks of accumulation rates at 12-leaf and 15 days after silking respectively for HFT, and there was Only one peak of accumulation rate at 12-leaf for LFT. Maximumrequirements of N, P2O5 K2O of corn Yedan No. 51 yielded 11613kg/ha were 230.25,104.25, 212.70kg respectively. The ratio of three elements was 1: 0.45: 0.92. The amounts of N,P2O5, K2O for production of 100kg grains were 1.983, 0. 898 and 1.832kg.The maximum accumulation rates of N,P2O5 and K2O were 4.86, 2.49 and 7.62kg/ha.d, and percentage of nicrogen, phosphorus and potassium in grain at maturity were 58.9,82.4 and 12. 5%.
出处
《玉米科学》
CAS
CSCD
1995年第4期56-61,67,共7页
Journal of Maize Sciences
关键词
夏玉米
施肥量
养分吸收
需肥规律
玉米
Summer-sown Corn
Rate of fertilizer
Nutrient uptake
Regulation of fertilizer requirement
