Results 81 to 90 of about 2,473 (184)

植物诱抗剂对尿素氮利用率和小麦产量的影响

open access: yesShuitu Baochi Xuebao, 2018
为研究植物诱抗剂配伍尿素和控释尿素对小麦产量及构成因素、氮肥利用率和土壤养分的影响,通过对尿素包膜(CRU)、包膜尿素配施诱抗剂(CRUR)、尿素配施植物诱抗剂(UR)的处理方式,进行了小麦大田试验,以尿素(U)和无氮(CK)处理为对照,共设置5个处理。结果表明:(1)尿素配施诱抗剂处理的小麦产量和氮肥利用率比尿素处理显著提高23.6%和10.1个百分点,纯收益显著增加3 269元/hm2。(2) CRUR处理较CRU处理小麦产量和氮肥利用率显著增加14.5%和12.4个百分点,纯收益显著提高2 ...
秦瑞劼   +5 more
doaj  

Effects of long-term fertilization on yield of wheat and soil fertility in dry-land of Loess Plateau

open access: yes, 2006
重点分析黄土高原长武试验站长期定位施肥试验地2004年长期施肥对小麦产量、肥料利用率及土壤肥力影响的试验结果,表明:单施磷肥和单施氮肥的产量很低,与对照的产量无明显差异,氮磷钾配施与氮磷配施能显著提高小麦的产量。单施磷肥的磷肥利用率最低,为1%;单施氮肥的氮肥利用率为12.5%;氮磷配施的氮、磷肥利用率均较高,磷肥利用率比单施磷肥提高5.7%,氮肥利用率比单施氮肥提高42.1%。氮磷钾配施较氮磷肥配施的氮肥利用率降低了4.5%,而磷肥利用率升高了2.2%,钾肥的利用率不高,仅为7.3 ...
张少民, 郝明德, 陈磊
core  

[Advances in targeted therapies for chronic spontaneous urticaria]. [PDF]

open access: yesZhejiang Da Xue Xue Bao Yi Xue Ban
Zhou L, Hu C, Wang S, Zhang R.
europepmc   +1 more source

[Impact of pre-pregnancy body mass index on maternal and infant outcomes in twin pregnancies]. [PDF]

open access: yesZhongguo Dang Dai Er Ke Za Zhi
Wang HY   +24 more
europepmc   +1 more source

[Oral Health Status of Obese Children andIntervention Strategies]. [PDF]

open access: yesSichuan Da Xue Xue Bao Yi Xue Ban
Cheng R, Lei L, Zhang R, Cai H, Hu T.
europepmc   +1 more source

[Correlational research on body fat rate and skeletal muscle rate with depression in the population of assisted reproduction]. [PDF]

open access: yesBeijing Da Xue Xue Bao Yi Xue Ban
Song X   +6 more
europepmc   +1 more source

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