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Titolo:
NITROGEN-FERTILIZATION AND ROW WIDTH AFFECT SELF-THINNING AND PRODUCTIVITY OF FIBER HEMP (CANNABIS-SATIVA L)
Autore:
VANDERWERF HMG; VANGEEL WCA; VANGILS LJC; HAVERKORT AJ;
Indirizzi:
INRA,AGRON STN,28 RUE HERRLISHEIM,BP 507 F-68021 COLMAR FRANCE DLO,AGROBIOL & SOIL FERTIL RES INST,AB 6700 AA WAGENINGEN NETHERLANDS AGR UNIV WAGENINGEN,DEPT AGRON WAGENINGEN NETHERLANDS RES STN ARABLE FARMING & FIELD PROD VEGETABLES LELYSTAD NETHERLANDS
Titolo Testata:
Field crops research
fascicolo: 1, volume: 42, anno: 1995,
pagine: 27 - 37
SICI:
0378-4290(1995)42:1<27:NARWAS>2.0.ZU;2-5
Fonte:
ISI
Lingua:
ENG
Soggetto:
PLANT GEOMETRY; DENSITY; RULE; MONOCULTURES; VARIABILITY; STANDS; YIELD;
Keywords:
CANNABIS SATIVA; FERTILIZER; FIBER HEMP; MANAGEMENT PRACTICES; MORPHOLOGY; NITROGEN; SELF-THINNING;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
28
Recensione:
Indirizzi per estratti:
Citazione:
H.M.G. Vanderwerf et al., "NITROGEN-FERTILIZATION AND ROW WIDTH AFFECT SELF-THINNING AND PRODUCTIVITY OF FIBER HEMP (CANNABIS-SATIVA L)", Field crops research, 42(1), 1995, pp. 27-37

Abstract

In fibre hemp (Cannabis sativa L.) a high plant density is desirable,but inter-plant competition may cause self-thinning, which reduces stem yield and quality. We investigated whether agronomic factors could reduce self-thinning in hemp. The effects of soil nitrogen level (80 and 200 kg ha(-1)), row width (12.5, 25 and 50 cm), type of sowing implement, and thinning method on self-thinning, growth, yield and qualityof hemp were determined in field experiments in 1991 and 1992. Soil nitrogen level affected plant morphology before self-thinning occurred. Due to enhanced competition for light more plants died from self-thinning at 200 than at 80 kg N ha(-1). In August stem yield of living plants was similar at the two nitrogen levels, but 5% of the plants had died at 80 kg N ha(-1) and 25% at 200 kg N ha(-1). Although dry matter losses resulting from self-thinning were greater at 200 than at 80 kg N ha(-1), crop growth rate was greater at 200 than at 80 kg N ha(-1). Apparently, the crop growth at 80 kg N ha(-1) was affected by a lack of nitrogen. At final harvest in September stem yield of living plants was 10.4 t ha(-1) at 80 and 11.3 t ha(-1) at 200 kg N ha(-1), bark content in the stem was 35.6% at 80 and 34.0% at 200 kg N ha(-1). The effect of row width on self-thinning was small relative to that of nitrogen level. More self-thinning took place at 50 cm row width than at 12.5 and 25 cm. During early growth and also in August stem yield was smaller when row width was larger; in September row width did not affect stem yield or quality. Type of sowing implement and thinning method did not affect self-thinning or stem yield.

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Documento generato il 24/11/20 alle ore 07:53:51