Improvement of rice (Oryza sativa L.) growth in upland conditions with deep tillage and mulch   总被引：1，自引：0，他引：1  

Yoichiro Kato  Akihiko Kamoshita  Jun Abe  Junko Yamagishi 《Soil & Tillage Research》2007,92(1-2):30-44

The productivity of upland rice in Japan as well as in the world is low and unstable owing to scarce and unpredictable rainfall. The objective of this study was to examine whether agronomic methods could enhance grain yield of upland rice. Four field experiments were conducted from 2001 to 2003 in Nishitokyo, Japan, under upland conditions with different water supplies, in order to quantify the effects of deep tillage combined with deep placement of manure (50-cm depth), straw mulch (6 t ha⁻¹), or their combinations on the growth and grain yield of rice. Mulch kept surface soil moisture higher than without mulch even at reproductive stage, and it increased yield to the greatest extent under the most favourable conditions with much rainfall before heading (i.e., 2003). Deep tillage with deep placement of manure induced deep root proliferation and higher nitrogen uptake, increasing biomass production, and panicle number, and consequently grain yield was enhanced under the two lowest yielding environments with less rainfall before heading. Rice plants with deep tillage with deep manure application without mulch tended to have lower leaf water potential and higher diffusion resistance during drought, and negative effects on grain filling and harvest index in some experiments compared with the control. When deep tillage with deep placement of manure was combined with mulching in two experiments in 2002 and 2003, grain yield always enhanced compared with the control (P < 0.10, 6.0 t ha⁻¹ versus 5.4 t ha⁻¹ on average), suggesting their synergetic mechanisms for yield increase and stabilization. The results showed that deep tillage or mulching can improve grain yield of rice under drought-prone rainfed upland conditions in a temperate climate on an Andosol, and their combination had more consistent and greater positive effects.  相似文献   

Effects of nitric oxide donor and nitric oxide synthase inhibitor on ruminal contractions in conscious sheep     

T. Onaga  H. Okada  S. Hagiwara  C. Nagashima  H. Inoue  W. Korczynski  S. Kato 《Research in veterinary science》2001,71(3):189-195

The present study was planned to evaluate a role of nitric oxide (NO) in the regulation of regular ruminal contractions in conscious sheep. Intravenous infusion of S-nitroso-acetyl-DL-penicillamine (SNAP) at doses of 3-30 nmol kg(-1) min(-1)for 30 minutes inhibited both the amplitude and frequency of ruminal contractions in a dose-dependent manner. However, intravenous infusion of Nomega-nitro-L-arginine-methyl ester (L-NAME) at doses of 0.3-3.0 micromol kg(-1) min(-1)did not alter the basal tone of intraruminal pressure and the amplitude of ruminal contractions. The frequency of contractions was slightly inhibited by L-NAME infusion at 1.0 micromol kg(-1)min(-1). The effects of L-NAME were abolished by simultaneous infusion of L -arginine at 30 micromol kg(-1) min(-1). These results suggest that exogenous NO can diminish the ruminal contractions, while endogenous NO is not involved in the regulatory mechanism of basal tone and regular phasic contractions of the rumen in healthy sheep.  相似文献   

Effect of canine adenovirus on JINET and Vero cells.     

T Murakami  H Kato  K Takada 《Nippon juigaku zasshi. The Japanese journal of veterinary science》1977,39(3):283-292

  相似文献   

Difference in glycosphingolipid compositions of avian Marek's disease lymphoma-derived cell lines and lymphoid leukosis lymphoma-derived cell lines     

Y Fujii  K Ikuta  S Kato  T Mikami  M Naiki 《Nippon juigaku zasshi. The Japanese journal of veterinary science》1988,50(2):471-479

  相似文献   

Bacteriophage typing of Staphylococcus aureus isolated from dogs in Japan.     

A Shimizu  E Kato 《Nippon juigaku zasshi. The Japanese journal of veterinary science》1979,41(4):405-408

  相似文献   

Swine fever. Immunisation of piglets   总被引：4，自引：0，他引：4  

P Precausta  F Kato  A Brun 《Comparative immunology, microbiology and infectious diseases》1983,6(4):281-289

Vaccination against Swine Fever using the CL Chinese strain can be done in 7-day-old piglets if they are born of non-immune sows. The simultaneous weaning and vaccination emphasises the safety of this strain. The excellent immunity observed confirms the immunocompetence of 7-day-old piglets. In piglets born of immune sows and also weaned at 7 days, passive protection can extend beyond the age of 2 months if the sow is vaccinated several months prior to gestation. The immune level of the piglets would seem to depend on the interval between vaccination of the sow and farrowing and can be attributed to the quality of the antibodies transmitted by the colostrum. Piglets born of sows vaccinated 10 months prior to farrowing can be vaccinated as early as 5 weeks; the protection percentage observed at the age of about 6 months is over 80%. A booster injection at this age then confers immunity to future breeders throughout their economic life, i.e. 4 years in the reported experiment.  相似文献   

Transport of the oval squid Sepioteuthis lessoniana Férussac, 1831 in Lesson 1830–1831 (Cephalopoda: Loliginidae) for up to 24 h and subsequent transfer to an aquarium     

Yuzuru  IKEDA  Yukio  UETA  the late Ikuko  SAKURAZAWA  the late Gen  MATSUMOTO 《Fisheries Science》2004,70(1):21-27

  相似文献   

ANTERIOR CRUCIATE LIGAMENT RECONSTRUCTION USING A COMPOSITE COLLAGENOUS PROSTHESIS: A BIOMECHANICAL AND HISTOLOGIC STUDY IN RABBITS     

Dunn MG  Tria AJ  Kato YP  Bechler JR  Ochner RS  Zawadsky JP  Silver FH 《Veterinary surgery : VS》1993,22(1):56-56

  相似文献   

A new freeze-dried living virus vaccine against sheep-pox     

Pierre Prcausta  Ferenc Kato  Georges Vellut 《Comparative immunology, microbiology and infectious diseases》1979,1(4):305-319

A sheep-pox virus strain has been adapted and multiplied in primary lamb kidney cell cultures. The main characteristics of the strain have been verified in vitro after clones were isolated, and the results confirmed its identity. The safety and the potency of the strain have been investigated in sheep.

The inoculation of the strain to sheep was followed by a post-vaccinal reaction materialised by a nodule at the site of inoculation and an increase of temperature by about 1°C. No reactions adversely affecting pregnancy have been noted. Immunisation was demonstrated by an increase in the level of neutralising serous antibodies and protection against the pathogenic virus. The immunity tended to decrease during the second year after primovaccination and a yearly booster vaccination appeared to be necessary. Primovaccination of lambs over 2 months of age produced a better immunity, especially when the lambs were born from vaccinated ewes.

This strain forms the active principle of a freeze-dried vaccine containing no adjuvant of the immunity.  相似文献   

Expression and distribution of monocarboxylate transporter 1 (MCT1) in the gastrointestinal tract of calves     

Kirat D  Inoue H  Iwano H  Hirayama K  Yokota H  Taniyama H  Kato S 《Research in veterinary science》2005,79(1):45-50

  相似文献