Wpływ doboru i agrotechniki roślin ochronnych na wzrost i plonowanie wsiewanej koniczyny czerwonej w różnych warunkach siedliska

Tadeusz Zając

Abstract

In 1982-1991 growth and yielding of red clover undersown in different cover crops was invwstigated. Following plant species were selected as cover crops - spring cereals harvested for grain: barlwy, oats, wheat and triticale. Plants harvested as qteen crops cultivated in pure stand: barley, oats, triticale baba beans, Dutch ryegrass, and in two species mixtures: oats spring vetch faba beans + Dutch ryegrass, Persian clover Dutch ryegrass, oats Dutch ryegrass. Host experiments were conducted with spring barley. more importaat assumptions of these experiments are mentioned in the discussion of results. Changiny climatic conditions i.n years during tillering of spring barley especially increased rainfall strongly modified growing conditions for undersown red clover. During 10 year period excesive tillering of barley resulted in the loss of red clover stand in three cases, and i.n two cases caused quite severe lossening (thinning) of red clover stand. This indicates thet the traditional way of cultivating red clover based on undersowing it in spring barley harvested for grain is very riski. Undersowing red clover in spring barley harvested for grain caused: - in case of single red clover plant, towering of leaf surface area by 5 times, and the lowering of its mass (weight) by 17 thugs, at the same time the stud density of red clover per lm was lowered by 3.6 times, and leaf area index (LAI) by 35 times. Worse development of red clover plants undersown in barley stand was excelerated after haevest. Thinned plants developed several times the number of stems when compared with plants grown in high density, and cultivated without the cover crop. This demonstrates the excellent ability of red clover for self regulation of its stand's density. Habitat conditions influenced the yield level of barley (cover crop) and red clover (companion crop) in a differnt way. Yields of spring barley and clover grown on chernozen soil (Prusy) were higher then yields of these plants obtained on cleyey mountain sail Undersowing of red clover into barley lowered the yield of hay in seccond year after sowing by 5.5% in case of Prusy, and by 2.3% in case of Wielopole. Succesive effect of cover crop on clover yielding was clearly observed in first cuttIng, lndipendently from habitat condition - spring whea: triticale giving higher- grain crop then barley wers cover crops for - ed From all agricu_tural pact connected with barley cultivation, nitrogen fertilization in rate of 60 Kg/ha, and the sowing at the rate 4 million gl per hector assured higher yield of grain but had negative el on growing conditions, and the development of clover lowered the density of undersown plants their yie Also, applicatior of growth retardant Flordimex T for purpose of shorteiing barley, s straw did not improve g conditions for Ted clover, and after 3 years it always dyed (dissapearcl Positive effect on clover yielding in seccond year sowing had: two week delay in sowing date, increasing then spacing to 33 - 44 cm, and cutting during the harvest at hight of 5 cm. The best cover crop turned out to be faba bean cultivate4i pure stand, and in mixture with Dutch ryegrass. Cultivation of red clover without the cover crop, becalm significantly lower yields during the first year, and in sem year yields similar to the once obtained while undersowot grain crops, is not the alternative and the indicatiot fa changing existing cultivation technology.
Other language title versionsThe effect of difforeac cover crops and cuitivation technology on growth and yield of undersown red clover in different habitat conditoins
Book typeMonograph
Other categories ROZPRAWA_HABILITACYJNA
Author Tadeusz Zając (FoAaE)
Tadeusz Zając,,
- Faculty of Agriculture and Economics
PublisherUniwersytet Rolniczy im. Hugona Kołłątaja w Krakowie, MNiSW [80]
Publishing place (Publisher address)Kraków
Issue year1993
Book series /Journal (in case of Journal special issue)Zeszyty Naukowe Akademii Rolniczej im. H. Kołłątaja w Krakowie. Rozprawy, ISSN 1233-4189, (0 pkt)
No182
Pages98
Publication size in sheets4.4
Languagepl polski
Score (nominal)20
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