Harvest methods and seed yield potential in Brachiaria hybrids
Harvest methods and seed yield potential in Brachiaria hybrids Harvest methods and seed yield potential in Brachiaria hybrids
Several methods are commonly used for harvesting forage grass seed. For the genus Brachiaria both manual and mechanized harvest has been employed. Mechanized harvest is further divided into direct heading and recovery of fallen seed. Seed harvesting procedures used in Brachiaria hybrids: Manual harvesting Thailand: (Field trials were conducted in Ubon Ratchathani province, Thailand (15 o N Lat., 130 masl, AAR 1538 mm). Effect of time of planting on seed production of Mulato II (Hare et. al., 2007a) Seven tiller planting dates were compared in a five replicate, randomized complete block field trial. Tillers with roots were divided from 1-yr-old Mulato II plants. Table 1. Effect of time of planting Mulato II on seed yields and seed yield components Time of planting Inflorescences m 2 Racemes inflorescence Spikelets raceme Seed yield kg ha -1 May 16 163 4.7 35.0 138 June 1 138 5.2 34.6 109 June 16 122 5.3 34.0 80 July 1 104 5.0 32.7 54 July 15 59 2.8 25.5 20 August 1 23 2.7 21.9 6 August 16 - - - LSD(P
Table 2. Effect of harvesting method on Mulato II seed yields and seed viability Harvest method Seed yield kg ha -1 TSW g -1 Seed viability % Knocking daily 230 8.79 92 Knocking twice daily 271 8.68 92 Knocking 2 days 255 8.94 89 Nylon net bag 509 9.03 91 Ground sweeping 87 8.20 84 LSD P
Several <strong>methods</strong> are commonly used for harvest<strong>in</strong>g forage grass <strong>seed</strong>. For the genus <strong>Brachiaria</strong><br />
both manual <strong>and</strong> mechanized harvest has been employed. Mechanized harvest is further divided<br />
<strong>in</strong>to direct head<strong>in</strong>g <strong>and</strong> recovery of fallen <strong>seed</strong>.<br />
Seed harvest<strong>in</strong>g procedures used <strong>in</strong> <strong>Brachiaria</strong> <strong>hybrids</strong>: Manual harvest<strong>in</strong>g<br />
Thail<strong>and</strong>: (Field trials were conducted <strong>in</strong> Ubon Ratchathani prov<strong>in</strong>ce, Thail<strong>and</strong> (15 o N Lat., 130<br />
masl, AAR 1538 mm).<br />
Effect of time of plant<strong>in</strong>g on <strong>seed</strong> production of Mulato II (Hare et. al., 2007a)<br />
Seven tiller plant<strong>in</strong>g dates were compared <strong>in</strong> a five replicate, r<strong>and</strong>omized complete block field<br />
trial. Tillers with roots were divided from 1-yr-old Mulato II plants.<br />
Table 1. Effect of time of plant<strong>in</strong>g Mulato II on <strong>seed</strong> <strong>yield</strong>s <strong>and</strong> <strong>seed</strong> <strong>yield</strong> components<br />
Time of<br />
plant<strong>in</strong>g<br />
Inflorescences<br />
m 2<br />
Racemes<br />
<strong>in</strong>florescence<br />
Spikelets<br />
raceme<br />
Seed <strong>yield</strong><br />
kg ha -1<br />
May 16 163 4.7 35.0 138<br />
June 1 138 5.2 34.6 109<br />
June 16 122 5.3 34.0 80<br />
July 1 104 5.0 32.7 54<br />
July 15 59 2.8 25.5 20<br />
August 1 23 2.7 21.9 6<br />
August 16 - - -<br />
LSD(P
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